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'''Warning: This page contains spoilers for the first series and the first four books of the second.'''

A SequelSeries to ''Literature/PercyJacksonAndTheOlympians'' by Creator/RickRiordan. It takes the same setting as its predecessor and is set a short time after.

The first book, ''The Lost Hero'', was released on October 12, 2010. The story follows a half-blood, Jason (like [[JasonAndTheArgonauts that Jason]]) finding himself in a school bus with absolutely no memory of who or what he is, along with a girl, Piper, and a boy, Leo. The three turn out to be half-bloods and run into Annabeth (from the first series) and someone named Butch, who are looking for a disappeared character.

The second book, ''The Son of Neptune'', was released on October 4th, 2011, and reunites the reader with an amnesiac Percy Jackson, who finds his way to a haven for Roman demigods and leads two newbie heroes on a quest.

The third book in the series, ''The Mark of Athena'', was released on October 2, 2012. Percy, Jason, the four new demigods, and Annabeth join forces to fly a CoolAirship to UsefulNotes/{{Rome}}, with Annabeth following a secret and dangerous mission from her vengeful mother.

The fourth book, ''The House of Hades'', was released on October 8, 2013. 5 of the 7 heroes must close the gate of Death while [[spoiler: Annabeth and Percy are trapped in Tartarus. If the door is closed while they are still on the other side, they're stuck there. But it's the only way to stop the giants from awakening Gaea. In the meantime, Camp Jupiter is a month from marching on Camp Half-Blood and destroying it. All of the seven are narrators.]]

The fifth and final book, ''The Blood of Olympus'', is scheduled for release in the fall of 2014 (probably early October again).

General tropes about the setting carried over from ''Percy Jackson'' should be left neatly at the bottom of the page.

'''Please place tropes which only apply to one character on the [[Characters/TheHeroesOfOlympus character sheet]].''' The main article is getting cluttered, and we're only on book four!

Has a [[http://tvtropes.org/pmwiki/crowner.php/BestEpisode/TheHeroesOfOlympus Best Installment Crowner]] now.

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!!This series provides examples of:

[[foldercontrol]]

[[folder:Tropes A-G]]
* AbusiveParents[=/=]ParentalAbandonment: Jason's mom.
** Queen Marie, Hazel's mother, actively (if unintentionally) cursed her daughter and resented Hazel for it when bad stuff started happening.
* AdultsAreUseless
* AffablyEvil: All the Giants are actually rather charming in their own twisted ways.
* AffirmativeActionLegacy[=/=]AffirmativeActionGirl: While a good majority of the characters in [[PercyJacksonAndTheOlympians the original series]] were Caucasian, of the five new heroes, one is Native American[[note]]Piper[[/note]], one is Latino[[note]]Leo[[/note]], one is African American[[note]]Hazel[[/note]], one is Chinese-Canadian[[note]]Frank[[/note]] -- and only ''one''[[note]]Jason[[/note]] is white. See [[FiveTokenBand Seven Token Band]].
** And now Reyna is confirmed to be Puerto Rican, meaning the Romans are led by a woman of color.
** Stated in-universe that Rome was ''much'' more diverse than Greece, due in part to the expansiveness of the empire, as well as the existence of New Rome itself. Also stated is how discrimination by race isn't an issue; you're only ridiculed if you're weak and can't pull your own weight.
* UsefulNotes/{{Alaska}}: The land beyond the gods. Where Percy, Frank, and Hazel go on their quest in ''Son of Neptune''.
-->''"As they trudged on, Percy thought about all the crazy places he'd seen. None of them left him speechless like Alaska. He could see why it was a land beyond the gods. Everything here was rough and untamed. There were no rules, no prophecies, no destinies--just the harsh wilderness and a bunch of animals and monsters. Mortals and demigods came here at their own risk."''
* AllGirlsWantBadBoys: Lampooned with Narcissus's nymphs. Team Leo!
* AllYourBaseAreBelongToUs: Polybotes' invasion of New Rome.
** New Rome's invasion of Camp Half Blood.
* AloneAmongTheCouples: This used to be the case for Leo. [[spoiler: Not anymore, as of ''House of Hades''.]] ''Everyone'' averts this, even Tyson and Ella, except Nico and Reyna.
* AmazonBrigade: The actual Amazons show up in Seattle.
** [[AllAmazonsWantHercules Amazon Kinzie Wants Percy Jackson]]: He doesn't return the sentiment.
** DoesNotLikeMen: Subverted. The Amazons like men perfectly well. They just like men to know their place even more.
** LadyLand: Amazon HQ.
** ProductPlacement[=/=]HiddenInPlainSight: Apparently [[spoiler:[[http://www.amazon.com Amazon.com]] is a front company for the [[http://en.wikipedia.org/wiki/Amazons actual Amazons]].]] And they apparently read on their Kindles when they ought to be on guard duty (though it's less likely to be ProductPlacement than JustForPun).
*** Thanatos uses an iPad to keep track of the dead.
* AmnesiacLover: Averted. Jason quickly reciprocates Piper's feelings, but he doesn't want to lead her on when he isn't entirely sure how he feels about her (first because of his amnesia, then because it turns out [[spoiler:they were never dating in the first place]], and ''then'' because of [[spoiler:Reyna]]).
** Subverted with [[spoiler:Percy. Annabeth is the one thing he's absolutely sure about from his old life]].
* AncientGrome: The ultimate aversion.
* AndTheAdventureContinues
* {{Animorphism}}: [[spoiler: The Zhang family.]]
* AntiHero: As mentioned in the previous series, Percy is not above prioritizing his loved ones over the fate of the world. It's blatantly stated that this will come into play later, and it will be up to [[spoiler: Frank]] to help him stick to his duty.
** Nico Di Angelo. A disturbing, powerful loner who's one of the deadliest mortals on the planet. Percy's still on the fence about him, given their troubled history, and he creeps the hell out of ''everyone'' on the Argo II, save Hazel and Annabeth. It doesn't help that [[TheHero Jason]] barely avoids fighting him after a misunderstanding--and he's not sure he'd be able to win.
* ArbitraryHeadcountLimit: By ''The Mark of Athena'' there is a team of seven demigods, but due to that many demigods together attracting too many monsters, most of the book is spent with forming random parties of two or three, usually leaving a few people behind on the Argo II from time to time. The result seems incredibly like an RPG - especially when Coach Hedge [[RequiredPartyMember forces himself into the party]] in Atlanta.
* {{Arcadia}}: A pastoral tapestry.
* ArtisticLicenseEconomics: King Midas's plan. Let's just leave it at that.
** Well, he WAS born before they really had invented it yet...
* ArtShift: The covers of the first two books. Probably deliberate, to accentuate the more culturally refined nature of the Greeks (featured in [[http://3.bp.blogspot.com/_DBkee5OgTYc/TB6Wc1InFpI/AAAAAAAABCA/xAePhaAzyGs/s1600/The_Lost_Hero_FINAL.JPG ''The Lost Hero'']]) verses the rougher, grittier [[spoiler: Romans]] (featured in [[http://1.bp.blogspot.com/-9QkM-He0xxU/Td5GLWHnq6I/AAAAAAAABQE/e1I6_B_8bF4/s1600/Son%2Bof%2BNeptune%2BFinal%2BJacket.jpg ''The Son of Neptune'']]).
* AscendedExtra: "D-list goddess" Khione plays a major role. Gleeson Hedge (referenced once in TLO) is another example. Will Solace and Jake Mason may also apply.
** Hylla, Circe's assisstant, last seen in ''Sea of Monsters'' turns up again as [[spoiler: Reyna's sister and queen of the Amazons]].
* AsskickingEqualsAuthority: One of the two possible ways to get promoted to praetor.
** Still in full effect for [[spoiler: General Tyson of the Cyclops Army]] too.
** Also the method by which the Amazons can challenge for the queenship.
* BackFromTheDead: Medea, Midas and his son.
** [[spoiler:Euryale and Stheno, Medusa's sisters, in ''Son Of Neptune'']] Also, Hazel and after the war games, Gwen (aka: Centurion Shish-ka-bob).
** Monsters coming back from the dead is nothing new. Unfortunately, due to [[spoiler: Death himself being chained]], monsters come back mere seconds after being slain.
** Let's just knock out all the tropes associated with "The Doors of Death are open, and Greek villains and monsters are coming back to life willy nilly":
*** BackFromTheDead: [[spoiler: Hazel sacrificed herself in 1941 to prevent Gaea from waking fully during World War II. Nearly seventy years later, Nico went to the underworld to sneak Bianca out, only to discover she'd already tried for rebirth. Instead, he rescued Hazel, who was also a child of Hades/Pluto.]]
*** DeathIsASlapOnTheWrist:[[spoiler: Pretty much the entire theme of ''The Son of Neptune'' - Death has been chained and the literal doors to the afterlife are now open.]]
*** DeathIsCheap
*** FirstEpisodeResurrection
*** ResurrectedForAJob
* BadAss: Nico flat-out tells the rest of the FiveManBand that Percy is the most powerful demigod that he's ever seen. Keep in mind that by this point he's met two children of the king of the Gods, ''and'' had literally been to hell.
* BadassArmy: The 12th legion.
* BadassBoast: Jason and [[spoiler:Porphyrion]] both during their boasting match.
-->'''Jason:''' [[spoiler:I'm the son of Jupiter! I'm a child of Rome, consul to demigods, praetor of the First Legion. I slew the Trojan sea monster. I toppled the black throne of Kronos, and destroyed the Titan Krios with my own hands. And now I'm going to destroy you, Porphyrion, and feed you to your own wolves.]]
-->'''Leo:''' Wow, dude. You been eating red meat?
** Percy to [[spoiler: Polybotes]], "You. Me. To the finish."
-->'''Percy:'''[[spoiler: Twelfth Legion. FULMINATA.]] Which then [[spoiler: shot out a thousand blasts of lightning that basically annihilated the Giants entire center line due to Percy's willpower.]] BAD ASS.
** Percy does this casually for himself and Annabeth in ''The Demigod Diaries''. [[spoiler: It fails hilariously.]]
--> '''Percy''': I'm Percy Jackson, son of Poseidon. This is Annabeth Chase, daughter of Athena. We help out the gods sometimes with little stuff, like - oh, killing Titans, saving Mount Olympus, things like that. Perhaps you've heard stories. So about [[spoiler:that caduceus...]] it would be easier to just hand it over before things get unpleasant.
** Not during a fight like most boasts, but this still deserves mention. When Hazel, youngest of the heroes, makes this declaration to Hecate, goddess of magic and crossroads: "“We’re going to find a way to stop Gaea. We’re going to [[spoiler: rescue out friends from Tartarus.]] We’re going to keep the crew and ship together, and we’re going to stop Camp Jupiter and Camp Half-Blood from going to war. We’re going to do it all.”
* BadassInDistress[=/=]DistressedDude: [[spoiler:Percy in ''The Lost Hero''. Nico takes up the position from him by the end of ''Son of Neptune''. Flips back to Percy and adds Annabeth by the end of ''The Mark of Athena''.]]
* BadBadActing: Acting isn't one of Frank's many abilities.
* BagOfHolding: Leo's magic toolbelt, which can produce any sort of tool (so long as it's not too huge) and apparently [[NoodleImplements breath mints.]]
** [[spoiler: Piper gets a Cornucopia which allows her to produce an unlimited supply of food and water]].
* BagOfSpilling: In ''The Son of Neptune'', Percy loses most of his memories. He is still effectively invulnerable due to his Curse of Achilles [[ATasteOfPower and repeatedly defeats the gorgons]]. Soon after June tells him that for him to enter Camp Roman he must lose his Curse of Achilles, leaving him vulnerable to harm, and he chooses to enter.
* BatmanGambit: Double subverted. [[spoiler: Percy tricks Phineas into giving up the location of Alcyoneus' lair, but it involves using himself as blackmail against Gaea and gambling that she'll come through for him.]] It works.
** Annabeth pulls off a ''beautiful'' one in ''The Mark of Athena''; it takes real nerve to [[spoiler: talk your enemy into literally ''sticking her head into a trap'', and that's ''after'' getting her to make the trap in the first place]].
* BattleCouple: Everyone by book three.
** Except Leo, a.k.a. the Seventh Wheel.
* BeautyIsNeverTarnished: Being claimed/blessed by Aphrodite invokes this. Piper tries her hardest to mess her appearance up, but her looks just keep fixing themselves for days afterward, to Piper's irritation.
* BestialityIsDepraved: Hazel is clearly grossed out by the story of how the Minotaur was born.
* BettyAndVeronica: This is the case about the triangle between Piper, Reyna, and Jason; however, it is unclear as to who is considered who, since both girls could be justified as either the Betty or the Veronica. Piper could be the Betty, since she is nicer, more outgoing, and less confident than the stoic Reyna (she believes that Reyna is more beautiful that her) and she just wants Jason to be happy no matter who he is with; she could also be the Veronica, since she is considered more beautiful than Reyna by Jason and she unintentionally interferes in what might have became a romance between the amnesiac Jason and Reyna. In the same way, Reyna could be the Betty, since she and Jason have known each other longer because she and Jason were best friends when he was at Camp Jupiter and she held romantic feelings for him (which were unrequited by Jason, he admits so himself), or she could be the Veronica, since she is meaner, more confident, and more aggressive (more "Roman") than the homely Piper and hides any feelings she has for Jason but wants him for herself. Ultimately, Jason chooses Piper, since he loves her for being who she is, and he never had any feelings for Reyna.
** Subverted with Leo, Frank, and Hazel, since Leo doesn't act on any feelings he has for Hazel, and Hazel isn't in love with Leo but rather with Frank. However, who is the Betty and who is the Veronica is more clear cut in this case. Frank is the Betty, since he and Hazel are best friends, he houses feelings for her, and he lacks self-confidence, while Leo is the Veronica, since he interferes in and complicates Hazel and Frank's relationship and is far more assured of himself than Frank is. By The House of Hades, this triangle is effectively over, since [[spoiler: Leo has fallen in love with Calypso.]]. All three of the characters comment on this new development.
* BetaCouple: Jason and Piper, Frank and Hazel.
* BigBad: [[spoiler: Gaea.]]
* BigBadassBirdOfPrey: The giant eagles at Camp Jupiter.
* BigDamnHeroes: [[spoiler: Percy, Frank, and Hazel and the Amazons during the invasion of New Rome.]]
* BilingualBonus: Doubles as FridgeBrilliance. Frank Zhang's grandmother calls him "Fai", also spelled as "Fei" (Riordan seems to be using the Taiwanese spelling rather than the mainland Chinese spelling), making his Chinese name "Zhang Fei". In RomanceOfTheThreeKingdoms, a book that every Chinese person knows, Zhang Fei was known for two things: being not particularly good looking, and being a superb warrior, capable of scaring off entire armies by [[OneManArmy himself]].
* BlackAndGreyMorality: On a supernatural level, with the Olympians being a dark grey and the giants being black. In the third book Percy thinks the gods are marginally better than the giants, but far from what can be considered "good." Calypso makes a similar remark in the fourth book that the gods are somewhat better than the Titans and Giants. Jupiter himself is noted to be far from a good role model despite his status as king and moral leader. The heroes tend to be more "white," but several of the characters who sided with the giants did so for the same reasons the Titans had an army in the first book series...the gods tend to be horrible to those who do not deserve it.
* BlessedWithSuck[=/=]CursedWithAwesome: A good portion of the main cast has to deal with powers that can be either crappy or awesome, depending on the situation.
** Leo, in addition to his technological talent, has [[spoiler: fire powers]]. Great for fighting monsters, right? Yeah, except for the fact that [[spoiler: said powers are difficult to control and extremely dangerous. Just ask Leo's mom. Oh, wait, you can't: she died in a fire ''started by accident by her son''.]] And Apparently the last son of Hephaestus with the ability [[spoiler: started the Great Fire of London.]] So that should give you an idea of what we're dealing with here.
** Hazel can summon precious minerals from underground [[spoiler: as per her mother's wish]]. While the ability has come in useful before, it absolutely ''ruined'' her [[spoiler: first]] life, as the stones curse anyone who holds onto them...
** Frank Zhang could darn well be the [[TropeCodifier Trope Codifier]] for both. [[spoiler: His life force is tied to a stick, and if it burns down completely, he dies. However, the fire from the stick has been shown to be able to free Death himself; who knows what other awesome stuff it could do. His Animorphism powers don't count, being just plain awesome without side affects.]]
* BlingBlingBang: Swords of gold
* BlondGuysAreEvil: Octavian. This is the second time Riordan has made the evil guy from camp an older blond dude. Averted by Jason.
* BloodMagic: Gaea plans to use Percy's blood in some kind of sacrifice to bring down the gods.
** Per book three, it's any one male and one female demigod. She just really wants it to be Percy and Annabeth.
* BloodyBowelsOfHell: Tartarus definitely fits for much of it.
* BodySnatcher: In ''Mark of Athena''.
* BreakTheCutie: [[spoiler: Leo's mom's death. Later, Festus dying on Leo.]]
** [[spoiler: Hazel's flashbacks]].
*** [[spoiler:Nico's confrontation with Cupid in House of Hades.]]
* BrickJoke: Annabeth's mouth is hung open at the horror of seeing [[spoiler: Tartarus]]. She compares her reaction to how Percy drools in his sleep, the very first thing she ever said to him.
* [[BrokeYourArmPunchingOutCthulhu Broke Your Arm Punching Out The Titans]]: The gods of Olympus are in no shape to fight a war against the giants precisely because they're still broke from fighting the Titans and Typhon.
* BroughtDownToBadass: Percy.
* CallBack: Ma Gasket shows up in ''Son of Neptune'' wanting revenge on Jason, Leo, and Piper. Percy also shows up to reclaim his place as a main character after being absent for the first book.
** Reyna's quest near the end of ''House of Hades'' closely resembles Percy's first quest in ''The Lightning Thief'': A demigod originating from the offending side (Percy/Reyna) has to return a powerful stolen artifact {The Master Bolt/Athena Parthenos) in order to prevent a devastating war. They are also aided by another powerful demigod (Annabeth/Nico) and a satyr (Grover/Hedge).
** "We've got a dam hole." And this one is from the ''original series.''
** When Percy shows up again after falling off a giant cliff and Hazel and Frank are surprised, he mentions that he's fallen from higher, which was another reference to the first series.
*** A lot of references to the past series show up in House of Hades, [[spoiler:the curses from past enemies that Percy and Annabeth encounter in Tartarus and Percy's brief time on Ogygia]] being just a few.
* CasualDangerDialog
* TheCaptain: Roman praetors.
* CatchAFallingStar: [[spoiler: Percy to Annabeth at the end of ''Mark of Athena''.]]
* TheCavalry: Amazon reinforcements in New Rome.
* CavalryBetrayal: [[spoiler:Polybotes's army assumes the Amazons are there to attack New Rome. In fact, they are riding to the Legion's aid.]]
* ChallengingTheChief: How the Amazons get their queens. This comes back to bite them when their Queen, who would side with the romans, is challenged by a Gaea-backed usurper [[LoopholeAbuse who keeps on coming back to life whenever she is killed]], winning through simple attrition.
* ChangingOfTheGuard: Percy and Annabeth are the only old characters who are part of the Seven.
* CharmPerson[=/=]JediMindTrick: Piper, Drew, certain other children of Aphrodite, and Medea.
* CherryTapping: [[spoiler:Bacchus technically pulls one of these on the two giants after spectating Percy and Jason beating them down for him. He simply steps in after they're done and, after a brief appeal to the crowd of ghosts whether he should or shouldn't, he simply bats them on the nose with his pine-cone staff, finishing them.]]
* ChekhovsGag[=/=]BrickJoke: Five books later, Annabeth proclaiming the Laistrygonian giants to be "Canadians" in Sea of Monster is brought back up in ''Son of Neptune'' where Percy calls them Canadians... in front of genuine Canadian Frank Zhang. Frank is not pleased.
* ChekhovsGun: The bronze dragon. Festus first appeared in the shorty story collection "The Demigod Files."
** And now Terminus. Seemingly a one-off gag, but then comes back in the climax [[spoiler: to help Percy defeat a Giant.]]
** Gorgon blood.
** Chinese Handcuffs.
* TheChosenOne: All of them were chosen by fate for their talents/gifts. No room for tag-along kids or the load.
** Percy: MakingASplash (the only one we know of)
** Piper: CharmPerson (excluding Drew-no-fighter )
** Leo: PlayingWithFire (only one in decades)
** Frank: {{Animorphism}}/ImmuneToFate/ AwesomenessByAnalysis
** Hazel: DishingOutDirt/ BackFromTheDead/ CoolHorse
** Jason: BlowYouAway/ ShockAndAwe (unique for flight)
** Annabeth: TeenGenius ([[spoiler:Arachne didn't stand a chance.]])
* {{Cliffhanger}}: Of the heart-wrenching kind.
** At the end of the Mark of Athena. A big tear-jerking yet a bit heart-warming ending with [[spoiler: Percy deciding to fall into Tartarus with Annabeth]]
* ClockworkCreature: Festus.
* ColorCodedForYourConvenience: Orange and purple [[spoiler:for the Greek and Roman camps, respectively.]]
* CompellingVoice: Medea, Drew and Piper all display this ability.
** [[spoiler: Thanatos]] in "The Son of Neptune".
* ContinuityNod: In PercyJacksonAndTheOlympians ''Sea of Monsters'' Annabeth regrets forgetting her special coconut sunblock from Medea's department store.
** And the bronze dragon also makes its first appearance in ''The Demigod Files''.
** Later plot point [[spoiler:Bob/Iapetus]]'s first appearance was also in ''The Demigod Files''.
** Also, while shopping in [[spoiler:Medea's]] shopping mall, a bronze breastplate that is corroded with acid is mentioned along with other merchandise belonging to deceased campers. It likely belonged to Silena or Clarisse.
*** The Armor coupled with [[spoiler:Aphrodite]]'s conversation with [[spoiler:Piper]] doubles as Fridge Brilliance when you realize [[spoiler:that Aphrodite was most likely referencing Silena when she held up the armor.]]
** Nereus, the old man of the sea, last seen in ''Titan's Curse'', makes a blink-and-you'll-miss-it but funny cameo in ''Son of Neptune''.
** Vitellius, in ''Son of Neptune'', asks whether or not Percy cleans stables during their first conversation. Since Percy's memory has gone, he can't remember that he did in ''Battle of the Labyrinth''.
** In Mark of Athena, Percy decides against telling some water nymphs who have been trapped that the nature God, Pan is dead, something he personally witnessed in The Battle of the Labyrinth.
** Also in Mark of Athena, Percy compares the problem with the doors of death to having a 'dam hole'. When the characters ask what he means he says it was an inside joke.
* CoolHorse: Percy, Jason ''and'' Hazel all have cool horses. Blackjack (a giant black Pegasus), Tempest (a storm spirit who happens to look and act like a horse) and Arion (fastest horse alive, capable of breaking the sound barrier, his favorite food is the cursed gold Hazel sometimes unintentionally summons)
* ConvenientlyAnOrphan: Most of the main and main supporting cast. Percy, Piper, and Annabeth are the only exceptions, and even the latter two don't have the best relationship with their {{Muggle}} parent.
* CoolBoat: [[spoiler: Percy blatantly calls the Argo II the most incredible ship he's ever seen.]] Averted by the beat-up dinghy that constitutes the entire Roman navy.
-->'''Hazel''': "I didn't even know we had a navy."
* CoolSword: Jason's Imperial Gold sword, which can also turn into a javelin- see SwissArmyWeapon. [[spoiler: Sadly, it broke during the fight with Enceladus.]]
* CrazyPrepared: The Zhangs have an armory in their attic that's almost as well stocked as the one at Camp Jupiter. They have everything from swords, bows, arrows, spears, even potato launchers for taking out earthborn. It comes in handy. (Don't forget the water-hose on the roof!)
* CreatorProvincialism: Noticeable aversion in comparison to the first series. Instead of all America, all the time (with a few digs at Canada), Heroes of Olympus looks set to be much more international: a Chinese-Canadian main character (complete with an exceedingly rare tip of the hat to Canada's military) a book cover set against the Quebec City skyline, a climactic moment in British Columbia, and a quest that looks set to take the heroes back to the original Rome and Greece.
* CrossoverCosmology: When meeting his dad for the first time in a dream, Leo exclaims, "Holy Mother!" Hephaestus chides him, "It's 'holy father', boy. I would think you'd know the difference."
** Topped in ''The Son of Neptune'' by rainbow goddess Iris, who hasn't quite decided whether her personal creed should be...Buddhism or Taoism. Amusingly, Buddhism canonically sees nothing wrong with being a god and Buddhist at the same time.
%% the crowning moments (awesome, funny and heartwarming) were moved to the YMMV tab. please don't add them back here.
* CrushBlush: Ella, Tyson.
* CurbStompBattle: Percy, Frank, and Hazel against the First and Second cohorts in the war games.
** Also, Hazel and Frank against [[spoiler: Alcyoneus the giant.]] It wasn't a totally one-sided battle, but they really gave him a beatdown.
* {{Cyclops}}: Ma Gasket and her sons. [[spoiler: Also, [[GentleGiant Tyson]]]].
* DarkerAndEdgier: Continuing the trend from the original series.
* DarkSecret: Piper thinks she'll have to betray her friends.
** [[spoiler: Hazel is directly responsible for Gaea bringing back Alcyoneus .]]
* DeathIsCheap: For the ''monsters'', which are regenerating within hours if not minutes because [[spoiler: Gaea]] made a new tunnel into Tartarus.
** Eventually, even some demigods are able to come back from the dead without even realizing that they are. [[spoiler: Freeing Thanatos puts a stop to that]].
* DeathGlare: Used by Percy in ''Son of Neptune''.
--> "He'd perfected his [[DeathGlare wolf stare]] over the last few months - a look that said: ''However bad you think you are, I'm worse''"
* DeadpanSnarker: Percy all the way, pretty much everyone.
* DeceasedParentsAreTheBest: Esperanza Valdez and Emily Zhang. Subverted with Marie Levesque and Jason's unnamed mother.
* {{Delinquents}}: Jason and his friends are students at a 'Wilderness School,' a {{boarding school}} in Nevada for 'bad kids.'
* DemonicPossession: [[spoiler: Eidolons, who start a war between the Greeks and Romans by possessing Leo, Jason, and Percy.]]
* DemotedToExtra: Annabeth, Chiron, and Clarisse.
** Grover has officially joined the list as of Son of Neptune.
** Annabeth recovers her lead status in ''Mark of Athena''.
* [[DidYouJustFlipOffCthulhu Did You Just Dump The Queen Of The Gods In The Little Tiber?]]
** Iris, the Messenger goddess, is [[spoiler:trapped in her store with an army of monsters, and Polybotes,]] outside. [[DidYouJustFlipOffCthulhu She throws a ding-dong at him.]]
* DisneyDeath: Oh no, Percy Jackson just fell off a cliff in a NoEscapeButDown situation! ... [[AvertedTrope wait]]. He fell into water.
* DividedWeFall
* DivineConflict: There's an interesting example when the Greek gods start fighting with the Roman gods in that ''[[SplitPersonality they're the same being]]'', their Greek half and their Roman half, and the greater the difference between them, the more conflict they find themselves in. Frank, for example, has Mars and Ares constantly yelling, trying to outshout each other in his head. The few that avoid this are the ones whose Greek and Roman aspects are virtually indistinguishable from each other.
* DoesNotUnderstandSarcasm: Hephaestus. He's not too smart dealing with organic life forms.
-->"That was sarcasm, wasn't it? Machines don't have sarcasm, usually."
* DoesThisRemindYouOfAnything: An amnesiac hero with a ton of martial skills and esoteric knowledge named [[Literature/TheBourneSeries Jason]].
* DotingParent: Mars (a marked contrast with his Greek counterpart, Ares), Hephaestus, and Hades/Pluto all take time to speak to their children even when Zeus has forbidden it.
* TheDragon: [[spoiler:Porphyrion, the king of the Giants]].
* DramaticWind: Invoked and lampshaded by Jason during his boasting match with [[spoiler:Porphyrion]].
* DrJerk: Healing is Damasen's talent. Tact is not.
* TheDulcineaEffect: Probably not what Reyna meant when she asked for Percy's help, but Percy interpreted it that way. See ShipTease.
* DungeonCrawling
* DugTooDeep: [[InvokedTrope Invoked]]. [[spoiler: Gaea forces Hazel to use her powers to resurrect [[NighInvulnerability Alcyoneus]]]]. After [[MyGodWhatHaveIDone realizing this]], [[spoiler: Hazel decides to [[HeroicSacrifice bury herself]] [[TakingYouWithMe with the giant]] to postpone Gaea's plans]].
* EasyAmnesia: Zigzagged. Both Jason and Percy have their memories stolen by Hera/Juno, [[spoiler: but get them back a few days after joining the other camp of demigods. Jason joins the Greeks almost immediately after waking up with amnesia, but only gets most of his memories back at first. The rest take presumably months to return. Percy wakes up with and spends roughly two months with only the faintest memory of Annabeth and little else, but gets all of his memory back pretty much all at once. While this is appropriate, as Jason needed time to learn to trust the Greeks while Percy's FatalFlaw [[FridgeBrilliance allowed him to trust the Romans quickly]],]] YMMV as to whose amnesia was easier. [[spoiler:Percy's memories returning quickly was also partly caused by his drinking gorgon's blood.]]
* ElementalPowers: The Seven
** [[DishingOutDirt Earth]]: Hazel
** [[PlayingWithFire Fire]]: Leo
** [[BlowYouAway Wind]]: Jason
** [[MakingASplash Water]]: Percy
** [[ThePowerOfLove Heart]]: Piper
** TheBeastMaster: Frank. Less well known but an 'elemental' power nonetheless, controlling nature and animals.
* EternalRecurrence: How many times do you think the Titans and giants will keep going after the Olympians?
** Invoked with Monsters, which regenerate to be fought again, and with immortals, as they don't change (much). Addressed further in TheKaneChronicles, which [[TheVerse share a universe.]]
%% EvenBetterSequel was moved to YMMV tab. please don't add it back here.
* EverythingSoundsSexierInFrench:
** Aphrodite apparently thinks so. Children of Aphrodite can speak and understand French. Why? Because it's the language of love, of course.
** Subverted in ''Son of Neptune''. Frank and Hazel try to talk to each other in French, but they're pretty bad at it. It is probably because Canadian French and Creole French are somewhat different?
* EvilCounterpart: The giants to the gods.
*** Porphyrion is this to Zeus/Jupiter.
*** Polybotes to Poseidon/Neptune.
*** Alcyoneus to Hades/Pluto.
*** Enceladus to Athena/Minerva.
*** Otis and Ephialtes to Dionysus/Bacchus.
*** Clytius to Hecate/Trivia.
*** Subverted with Damasen, who is the good counterpart to the war god Ares/Mars.
** Also Alcyoneus' lair to Camp Jupiter.
** Jason, Piper, and Leo each have an evil counterpart to themselves in "The Lost Hero".
*** Jason has Lityerses, a handsome and skilled swordsman who uses a golden sword and has scars on his body like Jason does, but he is arrogant and intentionally flaunts his attractiveness, unlike Jason. In even further opposition to Jason, who cares deeply for his sister Thalia, Lityerses cares very little for his sister, who was turned to gold by their father King Midas. Both Jason and Lityerses like Piper, as well.
*** Piper has Medea, another attractive individual who can charmspeak like Piper, but uses it for her own gain, unlike Piper. She also has connections to the Giants, like Piper does. Unlike Piper, Medea is confident in herself and her abilities. Both women have had a relationship with a hero named Jason, although Piper's was not real but Mist-induced (although it does eventually happen). To make it even worse, Medea manipulated Piper's father Tristan [=McLean's=] assistant Jane into tricking Tristan and allowing him to be kidnapped by Enceladus, who tried using him to blackmail Piper into betraying Jason and Leo.
*** Leo has two. The first is the Cyclops Ma Gasket, who is immune to fire and a skilled mechanic like Leo is, but uses her skills against the Olympians. In opposition to Leo, Ma Gasket is the eldest member of her family who didn't leave her sons Sump and Torque to fend for themselves as Cyclopes should, while Leo is one of the younger members of his family who was thrown out into the streets by his family after his mother's death. The second is Khione, the goddess of snow. While Leo can control fire, Khione controls ice. They both have similar parentage as they are both a child of a god: Leo is the son of Hephaestus, while Khione is the daughter of Boreas.
* ExplodingFishTanks: What did you think when you put Percy in an aquarium exhibit?
* {{Expy}}: Piper's father is mentioned to have played [[ThreeHundred The King Of Sparta]] and there is mention of ''The Poster'' which the two considered funny until [[MemeticMutation it hit the internet.]]
** There are several similarities between Annabeth and Reyna, the praetor of Camp Jupiter, in The Mark of Athena. Annabeth immediately notices some of them when she first meets her.
*** Both are considered the female leaders of their respective camps and are highly respected by their fellow campers.
*** Both have or were going to have a romantic relationship with the male leaders of their camps: Annabeth has one with Percy, while Reyna would have had one with Jason if he hadn't been kidnapped by Hera/Juno.
*** Both refuse to believe the worst has happened to their significant other. Annabeth is out searching for Percy throughout The Lost Hero, while Reyna refuses to hold an election for Jason's replacement as praetor despite others' pestering her for it, as she believes Jason is still alive.
*** Both of their love interests (Percy for Annabeth and Jason for Reyna) have a problem of being unable to pick up on Annabeth and Reyna's emotions or feelings.
*** Both of their love interests denied or deny an attraction to them. Percy doesn't realize how much he loves Annabeth until The Last Olympian, while Jason repeatedly tells his girlfriend Piper that he never was in love with Reyna. Despite Jason saying this, after he reclaims his memories in The Lost Hero, his memories of Reyna make him question his feelings toward Piper.
*** Both were involved in a love triangle with their love interest: Annabeth was in a love triangle with Percy and Rachel Elizabeth Dare in The Battle of the Labyrinth and The Last Olympian, while Reyna was in a love triangle with Jason and Piper [=McLean=] in The Mark of Athena, although Jason states that he never felt that way towards Reyna, even though Piper believes otherwise.
*** Both have been on a quest with their love interest; every quest Annabeth ever went on was with Percy (with the exception of her mission to reclaim he Athena Parthenos from Arachne) while Reyna and Jason once visited Charleston, South Carolina on a quest together.
*** Both of their love lives were interfered with by Hera/Juno and Aphrodite/Venus; Hera/Juno kidnapped Percy and Jason and sent them to the opposite camp, while Aphrodite/Venus promised to make Annabeth and Percy's love life interesting (r.e. Tragic) and said something to Reyna in Charleston that caused her to never act the same around Jason again.
*** Both are forced to hold an expression of fearlessness in public to prevent spreading panic throughout their forces. Annabeth even notices this whenever she first meets Reyna in The Mark of Athena, and it is implied Reyna notices this as well.
*** Both are very good at reading others' emotions and deducing motivations and/or feelings, while also hiding their own.
*** Both have a fondness for architecture, as they both were seen admiring New Rome in The Mark of Athena.
*** Both have knowledge of the others' culture, and do not judge them for it.
*** Both are the children of a war goddess; Annabeth is the daughter of Athena, the Greek goddess of wisdom, war, and battle strategy, while Reyna is the daughter of Bellona, the Roman goddess of war.
*** Both had a crush on Percy Jackson. Annabeth states that she has a crush on Percy since they first meet when they were twelve, while Reyna attempts to convince Percy to become praetor and become her "friend", which both Percy and Annabeth interpret as Reyna making a move on him.
*** Both visited Circe's Spa and Resort in the Sea of Monsters and met the other while they were there; Annabeth and Percy visited the Spa while looking for the Golden Fleece, and Reyna was one of Circe's assistants at the Spa and Resort. The two met while there; Reyna was one of Circe's attendants who combed Annabeth's hair and gave her a makeover.
*** Both are considered scary by a demigod of the prophecy; Hazel and Frank are both somewhat intimidated by Reyna, while Leo has been scared of Annabeth ever since they met at the Grand Canyon while wearing her "give me Percy Jackson or I'll kill you" look.
*** Both ran away from home; Annabeth ran from her father and stepmother's house in San Francisco after being attacked by spiders for three nights in a row, while Reyna and her sister Hylla ran away from San Juan and became Circe's attendants at her spa.
** Jason and Percy are nearly expies of one another and share a lot of similarities, but have enough differences to be considered very different from each other. They both acknowledge their similarities in The Mark of Athena and The House of Hades, and even act somewhat similar whenever they both say that they feel that they are failing since they aren't used to being among demigods of equal stature.
* ExtremelyShortTimeSpan[=/=]TimeBomb[=/=]CosmicDeadline
* FantasticVoyagePlot
* FaunsAndSatyrs: They are considered to be the same thing.
** Hedge mentioned that "Fauns are Roman." Seeing as how Roman demigods are quite different from their Greek counterparts, it wouldn't be surprising if this was the case with other magical creatures.
*** [[AndAnotherThing Possibly justified]]. They could have indeed become more or less the same if people began to believe that they were with different names. In the first series, it was said that the Titans Helios and Selene faded after the Romans reassigned their duties over the sun and moon to Apollo and Artemis, so it's not unprecedented for them to have been blended them together into the same creature/species.
*** And as of ''Son Of Neptune'', we've seen fauns, and they are, in fact, not the same as satyrs, to Percy's confusion.
* FetchQuest: Annabeth's charge in ''Mark of Athena''.
* FlirtingUnderFire
* FireForgedFriends: Played with. Leo and Piper ''think'' they've been friends with Jason for a while, but even when this is proven to be false, they're still tight from the time they ''have'' spent together.
** All of the Seven by the end of Mark of Athena.
* FiveManBand: In 'Mark of Athena'
** TheHero: Percy
** TheLancer: Jason
** TheSmartGuy: Annabeth and Leo
** TheBigGuy: Frank
** TheChick: Piper
** TheSixthRanger: Hazel, who has returned from the dead and doesn't always understand modern customs. Also doubles as TheChick and TheBigGuy.
%% FoeYay was moved to YMMV tab. please don't add it back here.
%% the fridge tropes (logic brilliance, horror) were moved to the YMMV tab. please don't add them back here.
* {{Foreshadowing}}: When Reyna summons Percy to a private meeting with her in the principia, [[spoiler: he sits in the other praetor's chair while waiting for her]].
** The Mark of Athena brings up a few times the fact that [[spoiler: all children of Athena are afraid of spiders]].
* GaiasRevenge: In the literal sense. Gaea seeks to take revenge on the gods for usurping her children, the Titans. Interestingly, she does ''not'' have nature-based powers, as in the original mythology this was the domain of Pan.
* GeniusDitz: Quite a lot of characters, including Leo, Frank, Percy, and Ella.
* GentleGiant: In their native home, the Hyperborean giants are peaceful. [[spoiler: Percy and Co. are still use one to help them escape from some griffins.]]
** [[spoiler: Tyson also technically counts]].
** [[spoiler: Damasen, as the opposite of Ares, is the most benvolent of the Giants.]]
* GettingCrapPastTheRadar: Schist.
** Much of Percy's interpreting for Arion consists of this.
** In "The Lost Hero", it mentions that Drew dumped, ''"everything from the bathroom waste bin- some pretty ''nasty'' things- all over the floor"''.
** Also, Piper's father says that he thinks "That Indian and Greek stuff is all bull "
** In ''The Son of Neptune'', the Amazon, Kinzie, blatantly flirts with Percy, telling him if he ever needs a new girlfriend, she's available. While we're never told exactly how old Kinzie is, it's safe to assume she's an adult (since not many teenagers can get jobs as security guards), whereas Percy is only ''sixteen.''
*** Plus, you have to wonder what Kinzie was thinking when she says Percy would ''look great in an iron collar and an orange jumpsuit.''
** In the same vein as Percy and Kinzie, ''The House of Hades'' also gives us Leo and Calypso. There was also a part like this back in the first series, though with Percy instead of Leo. Keep in mind that, again, Percy and Leo are only about 16, whereas Calypso is ''over 3000 years old''.
** From ''The Mark of Athena'' we have one scene where Percy and Annabeth fall asleep together on the ship. With some of the dialogue, one has to wonder if the original scene was a SexyDiscretionShot so that [[CensorDecoy Riordan could get it past the radar]].[[note]]To make things even more scandalous, Leo is just grinning and shaking his head in a way that screams DidYouJustHaveSex, and Hazel is scandalized, because she was from the 1940s.[[/note]]
---> '''Annabeth''': We just fell asleep together! We didn't do anything.
---> '''Percy''': We kissed a few times...
---> '''Annabeth''': Not helping!
*** Frank ''averted his eyes'' when he found them. It doesn't get much more blatant than that.
** Percy referring to Ephialtes as "The Big F."
** There is a scene in ''The Son of Neptune'' where Hazel takes Percy to the back of R.O.F.L. to help him get better and to call Camp Jupiter, while Frank goes outside to fight some monsters. Later, we find out that Percy and Hazel used an Iris Message to call Reyna...who at the time was taking a bath...did I mention that Iris Messages are basically video chat?
*** Frank also says he would have paid to see that (meaning he would have liked to see Reyna's shocked look, not her in the bath...or would he?)
* GoodScarsEvilScars: Jason has a little one on his lip from trying to eat a stapler when he was two. Lit, Midas' son and bodyguard is covered in them.
* GRatedDrug: Dakota, a son of Bacchus, is addicted to Kool-Aid. With three times the normal sugar.
* GrievousHarmWithABody: [[spoiler: Percy defeats Polybotes by smashing his face in with Terminus' head.]]
* GrimyWater
* GunshipRescue: [[spoiler:Subverted. The Argo II doesn't get to Camp Jupiter until the day after the invasion]].
** It does, however, pull off a lot of rescues in ''Mark of Athena''.
[[/folder]]

[[folder:Tropes H-M]]
* HarpingOnAboutHarpies: In ''Son of Neptune''. However, Phineas [[spoiler: [[WhosLaughingNow is not]] having as much trouble with them anymore, basically turning his curse into theirs, with one exception. In order to get his help, the [[PowerTrio Power Trio]] has to capture the harpy [[OurMonstersAreDifferent Ella]], and give her to him]]. [[BatmanGambit This isn't exactly what happens]].
* [[HaveYouSeenMyGod Have You Seen My Gods]]: Olympus has been closed and the gods have gone MIA. [[spoiler: Subverted. Even though Zeus ordered it, thinking it would lull Gaea back to sleep, several of the gods, thinking Zeus is making a mistake, have defied his orders. They had to do so covertly, however.]]
** In ''The Son of Neptune'' he seems to have changed his mind (or bowed to the inevitability of the others' meddling making the plan moot), allowing Mars to order a quest. That, or his more responsible Jupiter aspect can no longer ignore the situation and knows something must be done.
** In ''The House of Hades'' [[spoiler:the impending war between the Greeks and the Romans has caused the Greek and Roman sides of the gods to fight one another, rendering most major gods incapacitated unless one of their children does something particularly spectacular.]]
* TheHeavy: What with Gaea being a NonActionBigBad and all, each book has at least one villain that give the heroes more trouble than others.
** ''The Lost Hero'': [[spoiler:Khione.]]
** ''The Son of Neptune'': Alcyoneus.
** ''The Mark of Athena'': Arachne and the eidolons.
** ''The House of Hades'': Clytius and Pasiphåe on the surface; Tartarus himself in the eponymous pit.
* HellYesMoment: The Fifth cohort after Percy, Hazel, and Frank storm the defenders' fortress during the war games. The entire legion, especially Reyna, when they pull a BigDamnHeroes during the invasion. Not to mention [[MomentOfAwesome "TWELFTH LEGION]] [[ShockAndAwe FULMINATA!"]]
** [[spoiler: Frank taking charge of a ghostly Roman army in the House of Hades after an emergency promotion to freaking ''praetor''.]]
--> Nico: Now that's more like it. Let's turn this tide!
* HeroesUnlimited
* HeroicSacrifice: Percy is initially thought to have killed himself to take out a ghost army that threatened Hazel and Frank. Then, after defeating Alcyoneus, they go back to the glacier only to find Percy there, totally unperturbed at bringing a glacier down on himself.
** Played Straight in The Mark of Athena when [[spoiler: Percy(he really does tend to do this often) throws himself down to Tartarus to protect Annabeth.]] And there are only a few thousand supercharged monsters in his path!
* HistoricalInJoke:
** The American Civil War (1861-1865) was at least partially a war between Roman half-bloods and Greek half-bloods. (You should see Hazel's reaction when she finds out the Romans were in the Confederate side).
** The last child of Hephaestus that could create fire [[spoiler: before Leo]] was Thomas Faynor, who started the Great Fire of London in 1666.
** Frank's ancestor was blamed for the 1906 San Francisco Earthquake, [[spoiler: though it turns out he didn't do it.]]
** Jack London was a son of Mercury whose Wolf House burned down because it was built on sacred ground.
** Amazon.com Inc. was apparently founded or taken over by actual Amazon warriors and used to ship goods to Amazons worldwide.
** Johnny Weissmuller, US National Championship and Olympian (the sport version) swimmer, was apparently a merman trained by the ichthyocentaurs).
* HoldingHands: Percy and Reyna after [[spoiler: they defeat the invasion and he gets promoted to praetor]].
** Everyone who's paired off by book three. [[spoiler: And by "Everyone" we mean "Everyone except Leo". Mostly.]]
** A [[CrowningMomentofHeartwarming very sweet yet]] [[spoiler: very tragic version with Percy and Annabeth. [[TearJerker They're holding hands as they fall into Tartarus together.]]]]
** The entire group in House of Hades [[spoiler: during an emergency shadow-travel trip.]]
* AHouseDivided: [[spoiler:The Greeks and Romans need to ally themselves so they can defeat Gaea. Otherwise, they are SCREWED.]]
* HumanPopsicle: Quite a few, from those in Boreas' fortress and [[spoiler: the Hunters for a short time during the battle at the Wolf House]]. Midas' "house guests" probably count, too.
* IncestIsRelative / KissingCousins
** It is mentioned that unless you have the same godly parent, it isn't creepy for two demigods to have a relationship.
* IndyPloy:
-->'''Octavian''':So you do have a plan?
-->'''Percy''':We go to Alaska as fast as possible...
-->'''Hazel''':And we improvise.
-->'''Frank''':A lot.
* InelegantBlubbering: The Earthborn. "Yay-son! Where Yay-son? Kill Yay-son!"
* InstantAwesomeJustAddDragons: Festus
* InterspeciesRomance: [[spoiler: Ella and Tyson]]
** As well as Coach Hedge (a satyr) and Mellie (a wind spirit), [[spoiler: who are married and expecting a child by ''House of Hades''.]]
* InvisibleToNormals: The entrance to Camp Jupiter and New Rome.
* InvoluntaryGroupSplit: At the end of ''Mark of Athena''.
* ItBelongsInAMuseum: Piper initially believes this of the dagger she gets from Annabeth (it had once belonged to Helen of Troy). Annabeth tells her that they're surrounded by Ancient Greek stuff at camp, but weapons like that are the heritage of the demigods and are meant to be used.
** Annabeth says this about Arachne's tapestries.
* JediMindTrick: Charmspeaking.
* TheLastOfTheseIsNotLikeTheOthers:
-->The coffee shops were doing a brisk business, and street musicians filled the air with the sounds of guitar, lyre, panpipes, and [[CrowningMomentOfFunny armpit noises.]]
* LateArrivalSpoiler: After taking most of ''The Lost Hero'' to be revealed, Gaea being the new BigBad is spoiled in the first chapter of ''Son of Neptune''.
* LetsYouAndHimFight: Percy and Jason duke it out when possessed by evil spirits.
** [[spoiler: In the audiobook ''Son of Sobek'', Percy crosses paths with [[Literature/TheKaneChronicles Carter Kane]] while they are both hunting the titular giant crocodile, and they get into a fight when Percy mistakes Carter for a rogue demigod.]]
* LiteralCliffhanger
* LockedOutOfTheLoop: The gods, Chiron, and Lupa are keeping a big secret. The Lares of Camp Jupiter, too.
** A bit of story hints is that Chiron never mentioned [[spoiler:the Roman camp because he swore not to - chances are, Lupa wouldn't mention the Greek camp either]].
** [[spoiler: Nico]] has been keeping the secret as well; Percy in particular is less than thrilled by this.
* LongLostRelative[=/=]EveryoneIsRelated: [[spoiler:Jason and Thalia have the same mother, as well as being kids of the same god (Jupiter/Zeus respectively) but in different aspects.]]
** Hazel is [[spoiler: Nico's]] sister and Frank turns out to be [[spoiler: a descendent of Poseidon, so Percy and Tyson adopt him as their brother]].
** Leo is related to [[spoiler: Sammy Valdez, Hazel's boyfriend from back during World War 2--specifically, he is Sammy's great-grandson.]]
** [[spoiler: Heracles & Chrysaor to Jason and Percy. They try to kill each other.]]
* LoopholeAbuse: The Amazons get their queens crowned by fights to the death. Given the whole death thing, there's no law against repeat matches- so when an old queen comes back from the dead wanting a rematch (and being able to return even if she dies in battle), you can bet that Hylla was going to get out her law-fu ASAP.
* KillItWithIce: The result of getting hit by [[AnIcePerson Hyperborean]] [[BreathWeapon breath]]. Percy uses this to his advantage.
** Khione, the goddess of snow, is fond of doing this.
* LoveDodecahedron: Shaping up to be one between Piper, Jason, Reyna, Percy, and Annabeth, in that order.
** LoveTriangle: There is potential between Hazel, Leo, and Frank, but it remains to be seen if there will be one.
* MacGuffin: Athena Parthenos.
** AncientArtifact
** PublicDomainArtifact
** FamouslyMundaneFictionallyMagical
** MacGuffinGuardian: Arachne.
* MamaBear: An evil example with Ma Gasket.
** [[spoiler: Frank's mother protected her son from an actual bear by [[VoluntaryShapeshifting turning into one herself.]]]]
* MeetCute: Piper to Jason.
* MistakenForSpies: And Percy hates it.
* [[QuicksandSucks Muskeg Sucks]]
* MyGreatestFailure: The Romans lost their eagle standard in a disastrous campaign in Alaska in the 1980s. They're still sore about it.
** [[MyGreatestSecondChance They made up for it with some help.]]
* MythArc: The Gigantomachy.
* MythologyGag: JustForPun
[[/folder]]

[[folder:Tropes N-S]]
* NewPowersAsThePlotDemands: On a series level, not within the series. Apparently certain children of Hephaestus can wield fire and all children of Aphrodite have apparently always been able to speak French, and some can charm-speak people into doing what they want. {{Justified|Trope}} as it's stated that controlling fire and charmspeaking are ''ridiculously rare'', though some fans still think Aphrodite's children speaking French came from left-field.
** There was only one named camper from the Aphrodite cabin in the first series, and she was never in a situation where speaking French would have been remotely helpful. Combining that with the fact that Piper seemed honestly surprised she could speak it, and it's fairly justified.
** It was also never really delved into in the first series just ''what'' powers were granted to each god's children, and they seem to vary quite a lot among themselves as well.
** ''House of Hades'' has this within the series. Without any training, Hazel can manipulate the mist to do magic better than an immortal sorceress. Piper's own charmspeak and powers of love can now manipulate machines and have an effect on the physical world instead of only influencing people's behavior.
*** In Hazel's case, it's not that she is a master of the Mist, but that she knows how to use it to her fullest potential. Like Charmspeak, it's easier for her to offer suggestions and make her enemies think that they've got her on the ropes, rather than directly contradict them by imposing her own reality.
* NobodyPoops: A rather jarring example in ''House of Hades'': Percy and Annabeth spend the majority of the book in Tartarus, which is of course a hostile landscape with no decent bathroom facilities. It's never addressed.
* NotListeningToMeAreYou This exchange:
-->Percy: Hey, how's it going?
-->Annabeth: Uh, no thanks.
-->Percy: Okay... have you eaten anything today?
-->Annabeth: I think Leo is on duty. Ask him.
-->Percy: So, my hair is on fire.
-->Annabeth: Okay, in a while.
* OfficialCouple: Played with as of ''Son of Neptune''. Hazel and Frank share a kiss after [[spoiler: defeating Alcyoneus]], but we don't know if they're officially going out by the end.
** Percy and Annabeth. Later, it seems Jason and Piper have become this as well.
* OhCrap: [[spoiler: Alcyoneus after Frank and Hazel drag him into Canada. Polybotes when he realizes that Percy's got a god on his side.]]
* OneManArmy: It was mentioned that Greek Heroes are trained to handle things solo compared to the Romans who rely on military teamwork. Percy's fighting style is repeatedly mentioned to be un-Romanly because of this.
* OneSteveLimit: Averted; though it'd be very hard to confuse, Midas mentions his daughter being named Zoe (not to be confused with the first series' Zoë Nightshade).
** There's also a Jason at Camp Half-Blood playing Capture the Flag in Titan's Curse.
* OnlyTheKnowledgableMayPass: The ghosts think they have this. In fact, Annabeth guesses and bluffs most of it, though she does have the advantage that many of their "mysteries" were hinted at in the decor.
* OurDragonsAreDifferent: [[HumongousMecha Festus.]]
* {{Pirate}}: Chrysaor
* PirateBooty
* ThePlan: the Senates decision to send Percy and company to Alaska [[WithThisHerring in a leaky dinghy.]]
* PoisonedChaliceSwitcheroo: Percy manages to pull this on [[spoiler: Phineas]] with the [[spoiler: gorgon blood]]. He wins. Doubles as OutGambitted.
* PopularIsDumb
* ProtectThisHouse
* ThePowerOfLove: [[spoiler:This is how Piper saves Jason. Either that or he was OnlyMostlyDead.]]
** Arguably, [[spoiler:while she does have feelings for Jason, it may not have had anything to do with that-- she simply Charmspoke his soul to keep it from going to Hades.]] Still technically fits the trope, since only children of Aphrodite, goddess of love, can do this...
** [[spoiler:It was revealed in the second book that the Doors Of Death are open and heroes can escape death for the same reason that monsters reform almost instantly. ThePowerOfLove probably helped, but Gwen got back by herself, so...]]
* PowerTrio: Jason, Leo, and Piper.
** Percy, Hazel, and Frank.
** Throughout the whole of Mark of Athena, the seven of them regularly form into different Power Trios
* PrecisionFStrike: Except that the word "freaking" is used instead of the normal phrase. Going toe-to-toe against an ice goddess is definitely one of Leo's [[CrowningMomentOfAwesome Crowning Moments Of Awesome.]]
-->'''Leo:''' See, lady, that's what happens to snow in Texas. [[PunctuatedForEmphasis It. Freaking. Melts.]]
* PreAsskickingOneLiner: "My turn."
** "You. Me. To the finish."
* PreMortemOneLiner: Percy gets an awesome one in on [[spoiler: Polybotes]].
--> '''Percy''': ''[[spoiler: I'd like you to meet my friend Terminus. He's a god.]]'' *thunk*
** Frank also has a good one on [[spoiler: Alcyoneus]]
--> '''Frank''': ''Welcome to Canada, idiot.''
* PropheticFallacy: Several new prophecies are mentioned in ''Son of Neptune'', but are only half complete, leaving their ultimate meaning unclear.
* PropheciesRhymeAllTheTime: No one ever asks how they still rhyme after being translated from Latin
** Lampshaded by Octavian who insists that Mars' prophecy rhyme and be cryptic and vague. [[CrowningMomentOfFunny Mars pulls out a grenade.]]
* ProphecyTwist: Spoofed by Mars in ''Son of Neptune''. When asked by Octavian for a prophecy, a cryptic poem to guide the quest, Mars writes down the most bluntly straightforward prophecy ever with absolutely no ambiguity whatsoever.
* PurpleIsPowerful: The demigods in Camp Jupiter wear purple shirts.
* PutOnABus: As the series is an ensemble, focusing on several new characters as well as old ones, many of the main characters from the original PercyJackson series take on secondary or cameo roles in the first two novels.
* RaceAgainstTheClock: Before solstice! Before the Feast of Fortuna! Before Nico suffocates! [[spoiler: Before Percy and Annabeth die to thousands of the worst monsters in history!]]
* RaisedByWolves:[[spoiler: Camp Jupiter, specifically by the wolf-goddess Lupa who raised Romulus and Remus]]
* RealMenWearPink: Minor character Butch, a bulky dude with a shaved head and a face like a pile of bricks. His mother is Iris, the Rainbow Goddess. Got a problem with that?
* RecycledINSPACE: The ''Argo II'' InUniverse.
* RememberTheNewGuy:
** [[spoiler:[[WeirdnessCensor The Mist]] is used, to get Jason's classmates to think that he had always been in their class. Leo Valdez believes that Jason was his best friend, and [=Piper McLean=] even has memories of dating Jason.]]
** The Roman Aspects were not mentioned at all in the original Quintet... however ''The Lost Hero'' justifes this in that the Greek and Roman Aspects do ''not'' get along at all, hence the need for them to remain hidden from each other. In fact, a clever reader can point out that the only ones explaining the roman aspects are, of course, Romans, and that the Romans felt this way about the Greeks. (Since Lupa's not one to tell!)
** Related, Jason Grace. Thalia didn't mention having a little brother for several reasons, among them being that the events surrounding his disappearance were ''quite'' traumatic for her and that she thought him dead until this series began.
* ReptilesAreAbhorrent: Basilisks are abhorrent, ''and'' they destroyed Frank's bow!
* Film/RomanHoliday: Tiberius and Rhea Silvia appear as GregoryPeck and Creator/AudreyHepburn, then drive Annabeth away on a vespa.
** Percy mistakes them for the cast of MadMen.
* RummageFail: When facing off against [[spoiler: Lycaon]], a nervous Leo reaches into his [[BagOfHolding tool belt]] for a weapon and initially grabs breath mints before hastily swapping them for a hammer. He hopes no one noticed. This is turned into a BrickJoke ''seconds'' later when the perspective switches to Jason, and while evaluating his assets, he thinks about "''Leo, who apparently thought he could defeat the armies of darkness with breath mints.''"
* SadisticChoice: [[spoiler: In the second excerpt of ''Son of Neptune'', "June" (Juno) tells Percy that he can endure suffering and tragedy and maybe save his friends, or live happily under the ocean while the world ends.]]
** [[spoiler:Jason and Percy become possessed by ghosts and attack each other. Piper is ordered to decide which one will survive.]]
** Also keeps with the HistoryRepeats theme of the series, as [[spoiler: Hercules/Heracles was offered essentially the same choice.]]
** Several characters outright state that Percy's gonna have to make another one sometime in the future, but likely won't be able to, due to his fatal flaw: loyalty to his friends above all else.
** Plays out twice over in [[spoiler: The House of Hades: Percy opts to fall into Tartarus with Annabeth, leaving Frank to hold the quest together, just as Mars predicted. At the end, he and Annabeth are forced to leave Bob and Damasen behind to fight off Tartarus and operate the Doors of Death while they escape.]]
* SaveYourDeity: Jason, Piper, and Leo have to [[spoiler: rescue Hera before the solstice.]]
* SealedGoodInACan: Percy was kept asleep by Juno for several months until the time was right for him to go to Camp Jupiter.
** Hazel's time [[spoiler:in the Underworld]] also qualifies.
* SecretTestOfCharacter: Percy thinks "June" is trying to put him through one in the beginning of ''Son of Neptune''.
** Hazel thinks it's a test too - she orders Frank not to fire, because she thought Percy was a god in disguise.
* SecretlyWealthy:
** Piper could probably try and tell her old classmates the truth: that her dad's Hollywood A-lister Tristan [=McLean=], but she knows they'd never believe her.
** Insecure, awkward Frank lives with his very wealthy grandmother.
* SelfMadeOrphan:
** This is the reason why Leo is initially afraid of his [[PlayingWithFire fire powers]]: [[spoiler:when he was a kid, [[BigBad Gaia]] visited the workshop where he and his single mother were, with the firm intention of preventing Leo from becoming a powerful enemy; Leo used his powers to try and protect his mother, but lost control and started a fire, accidentally killing her instead. He still has his father, but since he's the god Hephaestus whom Leo only met at 15...]]
** [[spoiler: Hazel killed her mother and herself to stop Gaea from raising Alcyoneus back in 1942.]]
* [[FiveTokenBand Seven Token Band]]: So far, the seven demigods of the prophecy include a Native American girl (Piper), a Latino (Leo), a Chinese-Canadian (Frank), a black girl (Hazel), and two white guys and a girl (Jason, Percy and Annabeth).
** Particularly jarring when compared to the first series, where there were almost no minority characters. Makes some sense, as Rome was much more diverse than Ancient Greece.
** [[spoiler:And we can also add Nico, who turns out to be gay.]]
* SixStudentClique: In Mark of Athena, albiet with 7 members.
** The Head -- Percy and Jason
** The Muscle -- Frank (Shapeshifting helps)
** The Quirk -- Leo
** The Pretty One -- Piper
** The Smart One -- Annabeth
** The Wild One -- Hazel (Comes from a different era and is technically dead).
* SickeningSweethearts: Tiberinus and Rhea.
* SirSwearsALot: [[CoolHorse Arion,]] according to Percy.
* ShipTease: Percy and Reyna as well as Reyna and Jason. While she and Jason weren't a couple, Reyna is shown to be fond of him. It's also fairly common for praetors to become romantically involved. Then Jason disappears for eight months [[spoiler: and Percy becomes the new praetor]].
* ShoutOut: Jason suggests Leo jump off a building and yell "[[ComicBook/FantasticFour Flame on!]]"
** [[spoiler:Iris]] owns a shop with the acronym R.O.F.L whose workers are called [=ROFLcopters.=]
** Whilst working on the [[spoiler: warship that will carry the heroes to Greece]], Leo complains about the [[{{Thundercats}} samophlange]].
** The name "Perry" getting mentioned in the scene with [[PhineasAndFerb Phineas]].
** Butch, the stable keeper at Camp Half-Blood, is a son of Iris, the Rainbow Goddess. He likes Pegasi. [[WesternAnimation/MyLittlePonyFriendshipisMagic Remind you of anypony?]]
*** Not only that, but in ''Son of Neptune,'' Alcyoneus calls [[CoolHorse Arion]] a "little pony".
** Frank mentions in Mark of Athena that he saw a TV show where they proved that Archimedes Death Ray [[Series/{{Mythbusters}} couldn't have worked]].
** In ''The Demigod Diaries'' Leo starts singing the theme song of {{Psych}}.
** While fighting the [[spoiler:eidolodons]], Leo says [[TheLordOfTheRings "One basketball to rule them all."]]
** Bacchus incorrectly refers to Jason Grace as Creator/JohnGreen.
** While steering the ''Argo II'', Coach Hedge starts to sing the Pokémon theme song, except replacing ''Gotta Catch Them All'' with ''Gotta Kill Them All.''
** In Mark of Athena, Tiberinus and Rhea Silvia appear as [[Film/RomanHoliday "Audrey Heburn and Gregory Peck"]]. Percy mistakes them as the actors from MadMen.
* StartOfDarkness: It's ''very'' possible that [[spoiler:''The House of Hades'' is this for Percy. He's growing increasingly protective of Annabeth, to the point that at times, the extremes he's willing to go to in order to protect Annabeth frighten her.]]
* ShownTheirWork: Creator/RickRiordan has been around in real life, and used to be an editor for mythology books. And it shows. He actually gets a lot of common misconceptions correct, such as how Thanatos is ''actually'' Death itself, and that Pluto was not ''just'' the lord of the underworld but ''also'' the god of wealth and the earth.
* StayingAlive: Gaea grants her minions this.
* StealthPun: In Mark of Athena, Leo (upon hearing that there is a bounty on their heads) makes a wisecrack about being worth two, or three Franks. Franks. As in, [[UsefulNotes/OldFrenchMoney Francs.]]
* SteamPunk: Leo describes the Hephaestus cabin as steampunk. The term also applies to [[HumongousMecha Festus.]]
* SummonBiggerFish: Summon Hyperborian giant, actually. (Or at least run underneath one.)
* SummonMagic: Frank's godly parent gives him a spear tipped with a Dragon's Tooth that can be used thrice. Breaking it off in the ground creates a zombie warrior roughly akin to the Terminator.
** Nico uses the Scepter of Diocletian to call up a Roman ghost-legion in ''The House of Hades.''
* SuspiciouslySimilarSubstitute: Reyna and Piper.
* SupernormalBindings: Thanatos, god of death, has been captured and bound with chains. The only thing that can break them is the flame of life, meaning Frank has to [[CastFromLifespan burn off part of his life force]] to cut through them.
* SwissArmyWeapon: Jason's weapon begins as a gold coin; a toss causes it to become an Imperial Gold sword or javelin on heads or tails respectively.
* SwitchingPOV: Each character gets their turn to have their perspective told (from a third-person limited POV). To help with this, in lieu of chapter titles Riordan just puts "[CHARACTER NAME]" in [[NoIndoorVoice ALL CAPS]].
[[/folder]]

[[folder:Tropes T-Z]]
* TakingYouWithMe: [[spoiler: Averted. Hazel and Frank are afraid Percy has done this to get rid of the Roman shades in Alcyoneus's lair, but the readers know he's fine because his water gifts will protect him from the fall.]]
** [[spoiler: Played straight during Hazel's ''first'' life, when she discovers she was being manipulated by Gaia into reviving Alcyoneus, the giant. She uses her powers as a daughter of Pluto to bring down the cave where the giant was forming, killing herself, her mother and effectively delaying the giant's revival for several decades.]]
** Arachne.
* TeamMom[=/=]TeamDad: [[spoiler:Lupa]] and Chiron.
* TeamPet: Festus.
** Hannibal the elephant for Camp Jupiter as a whole.
* TeethClenchedTeamwork: There is quite a bit of animosity between Hera and more than a few demigods, particularly Annabeth and Thalia, but as Piper points out, they will have to work together to beat the Giants and [[spoiler: Gaia]].
* TextileWorkIsFeminine: Subverted. Annabeth has to weave, but it is part of a deadly test and is not presented as feminine.
** Note, though, that it's a carryover from Greek mythology in which this trope was frequent (and commonly associated with Athena).
* TheyPlottedAPerfectlyGoodWaste: [[spoiler: see GunshipRescue above.]]
* ThinkNothingOfIt: Tiberinus to Rhea.
* ThreeAmigos: Jason, Leo, and Piper. Also Percy, Frank, and Hazel.
* ThresholdGuardians: Hercules.
* TitleDrop: Hera/Juno does it while speaking with Jason about his destiny in the last chapter of ''The Lost Hero''.
* ToHellAndBack: Percy has already been to Hell twice. [[spoiler: He and Annabeth barely survive Tartarus in House Of Hades, which is more or less Super Hell.]]
* TokenMinorityCouple: Frank and Hazel.
** Before that, Sammy and Hazel.
* TokenTrio: Jason as the [[WhiteMaleLead quest leader]], Piper as the Native-American love interest and Leo as the [[BlackBestFriend Latino Best Friend]].
** Also in "The Son of Neptune" with Percy (white), Frank (Asian), and Hazel (black).
* TooDumbToLive:
** Continuing on from the [[Literature/PercyJacksonAndTheOlympians previous series]], where the heroes tend to make the same mistakes. What is worse is the gods. Zeus knows the giants cannot be defeated without the aid of the demigods so what does he choose to do? Seal up Olympus and ignore the problem repeating the same mistake he made with the Titans. Throughout all of the books, Zeus makes a series of "too dumb to live" mistakes. Ladies and Gentlemen, the ruler of the world!
** Alcyoneus, as pointed out by Frank - when you're unkillable as long as you stay in the boundaries of the state of Alaska, you really shouldn't hang out in the part of the state that's only 10 miles wide.
--> '''Frank:''' "Welcome to Canada, idiot."
* {{Touche}}: Gaea's grudgingly impressed by [[spoiler: Percy's gamble to force her to choose him over Phineas.]]
* TrojanHorse: [[InvokedTrope Invoked by]] [[spoiler: [[ObstructiveBureaucrat Octavian]], who uses the "beware Greeks bearing gifts" line to try and [[ExploitedTrope incite conflict with the Greek demigods]] and so maintain his own power]]. [[CoolBoat It's not exactly a horse though, and nor is that actually the plan.]]
* TrueCompanions: Percy comes to consider Hazel and Frank as important to him as anyone from Camp Half-Blood.
* TrulySingleParent: Aphrodite was born from the sea foam produced from Ouranus's body when it fell into the ocean.
* TwoGuysAndAGirl: Both trios for both books 1 and 2.
* TwoLinesNoWaiting
* UndergroundLevel: The final battles of book three are all underground.
** Possibly even AbsurdlySpaciousSewer, though there's historical justification.
%%TheUntwist was moved to the YMMV tab.
* UnluckyChildhoodFriend: Sammy [[spoiler:Valdez]].
* UnusuallyUninterestingSight: Lampshaded when Percy runs through traffic with "June" [[spoiler: Juno]] in ''Son of Neptune'', most of the drivers, "''just swerved and looked irritated, as if they had to deal with a lot of ratty teenagers carrying old hippie women across the freeway.''" It's [[WeirdnessCensor The Mist]] again.
* TheVerse: It shares one with its prequel series (naturally) and ''Literature/TheKaneChronicles''; in that series characters mention odd things going on in the United States as well. Solidified with Drew and Lacy's appearance in ''The Serpent's Shadow'' and Carter Kane appearing in ''The Son of Sobek.''
* VoluntaryShapeshifting: All gods can do this. [[spoiler: All of Frank's family can too]].
* WalkIntoMordor: In ''the Son of Neptune,'' the heroes can't just fly to Alaska [[JustifiedTrope because Zeus would kill Percy if he tried it.]]
* WalkingWasteland: Hazel's life gives off this vibe. Wherever she goes, cursed gems and gold emerge from the earth that could kill innocents who picked them up. Pluto seemed to imply that most of his children are like this to some extent, Hazel just takes it UpToEleven.
** Nico too. In House of Hades, flowers and grass surrounding him dies when he gets stressed or angry.
* WhiteMaleLead: In a sequel series that seems to [[AffirmativeActionLegacy amp up]] [[AffirmativeActionGirl the minorities]] compared to its predominantly Caucasian prequel, Percy and Jason still stand out as being the attractive, white, straight, cisgender male powerhouses among the Seven.
** Subverted in ''Son of Neptune'' - Frank is the official leader of the quest. [[spoiler: And again in House of Hades, when Jason promotes Frank to praetorship to lead the ghost army.]]
* WindowLove: Piper and her father [[spoiler: after he's lost his memory]] do this through a video chat, with their hands touching on "opposite sides" of the computer screen.
** She's a child of Aphrodite. ThePowerOfLove [[AWizardDidIt did it?]] [[TheFourLoves Not all love is romantic after all.]]
* WhoWantsToLiveForever: Mars shows that he has this sentiment when speaking to his son Frank about Frank's dying grandmother.
-->''" Life's only precious because it ends, kid. Take it from a god. You mortals don't know how lucky you are."''
* WinterRoyalLady: Khione.
* TheWindyCity: Although Riordan doesn't seem to realize that Chicago is called the "Windy City" because of blustering politicians, not the weather. It ''is'' windy, though. Especially in the winter, when it's also freezing cold. Also, perceptions are important in this series, so if people think that Chicago is literally windy, that's where the Wind will go.
** [[{{FridgeBrilliance}} The series does make a habit out of showing that mortals rarely get the reasons for something right, either.]] [[{{WildMassGuessing}} Maybe WE'RE the wrong ones...]]
* WithThisHerring: The only formal aid the Roman Senate gives Percy, Frank, and Hazel on their quest to save Camp Jupiter in ''Son Of Neptune'' is the piece-of-crap dinghy that sinks outside of Seattle.
* [[spoiler:[[TheManBehindTheMan Woman Behind The Man]]: Gaea, behind her son, [[TheDragon Porphyrion]]]]
* WombLevel: Tartarus (the realm) is literally the body of Tartarus (the EldritchAbomination). When [[spoiler: Annabeth and Percy]] fall down there, they sometimes wonder what part of his body they're walking on.
%%TheWoobie was moved to the YMMV tab. Please don't move it back here.
* WorldOfPun: Riordan being Riordan, almost as frequent as snarking. Special mention goes to Lupa, directed to Jason: "As always, you are our saving ''Grace''."
* WorfEffect: The Giants. Despite being stated to be the greatest threat Olympus has ever faced and three revealed being so far created as direct counters to the most powerful Olympians they have all be defeated fairly easily. Possibly justified in Porpheryion at least was not at full power. That and Percy is just that badass, so a villainous example of OvershadowedByAwesome?
* WrenchWench: Leo's mom and his half-sister Nyssa.
* YouNoTakeCandle: Somewhat [[SubvertedTrope subverted]] with Ella, who despite her intelligence speaks like this because she is a harpy and that's just what they do.
* YouAreWorthHell: [[spoiler: The end of Mark of Athena ends with one of these, with Percy getting dragged down to Tartarus with Annabeth instead of just letting her go.]]
[[/folder]]

[[folder:Series Tropes]]

-> ''Setting tropes imported from the previous series (elaboration on the original series' page):''

* AbusiveParents
* AbusivePrecursors
* ActionGirl
* AllMythsAreTrue
* AttentionDeficitOohShiny
* BeethovenWasAnAlienSpy
* BigDamnHeroes
* CannotSpitItOut
* ChangelingFantasy
* CreatorProvincialism
* DaddyHadAGoodReasonForAbandoningYou
* DivineParentage
* EveryoneIsRelated
* EverythingsBetterWithRainbows
* FluffyTheTerrible
* {{Hero}}
* HeroicBastard
* HeroicLineage
* HumanMomNonhumanDad
* KidHero
* LetsGetDangerous
* LIsForDyslexia
* LivingMacGuffin
* NatureSpirit
* PropheciesAreAlwaysRight
* PsychicDreamsForEveryone
* ReallySevenHundredYearsOld
* ShipperOnDeck
* SuperheroSchool: Or rather, Superhero Summer Camp.
* SuperReflexes
* WeirdnessCensor
* WorldOfSnark

[[/folder]]
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