Agatha H. and the Airship City: Othar's comment upon being told by Agatha that she is not The Baron's Beautiful But Misguided Daughter: "Are you sure? I'm usually very good at spotting the offspring of evil geniuses."
Agatha H. and the Clockwork Princess: The (wasped) messenger from Sturmhalten is identified as a Count of the Blitzengaard family, making him a relative of Tarvek, and Martellus (whose appearance is a long-way off in the books). That he is wasped is also a minor factor for the next book.
The Corbettite Railways get a mention, with their having a station only a kilometre from Mechanicsburg, though the railways and the order do not make an appearance yet. The man who developed The Lion was one of their members as well.
When Agatha trips on the stairs leading to Castle Heteorodyne, and Zola picks her up, the narration notes that despite her (very pink) outward appearance, she does so with surprising strength.
During the bar fight, not only is Higgs the only one not fighting, but the Jägers are giving him a very wide berth. Even when he throws a chair into the fray, they ignore him. Not to mention he's in suspiciously good shape for a man who went through all the nonsense he'd gone through just two days prior.
A subtle one: It's been more-or-less confirmed outside the comic/novels that Gil and Zeetha are unknowingly brother and sister. When they first meet, she pinches at her nose while thinking, a mannerism that in turn makes a slightly-puzzled Gil think of his father.
The sideplot with Zeetha and Higgs foreshadows a few things that had only been recently revealed in the comic by the time the book was released. In addition to Higgs being a Jaeger and in the employ of the Heterodynes, Higgs notes that Mama Gkika did something to Zeetha in order to heal her, and is pleased that she immediately shows loyalty to Agatha. She was actually given the Jaegerdraught, theoretically transforming her into a Jaeger.
While using the equipment at the top of the Heterodyne Observation Tower, Agatha catches a glimpse of The Awful Tower in Paris, a place she has no reason or motivation to visit yet.
And Then There Were None. Soon after arriving to a manor with several others, one of the characters goes into his room and takes a bath while pondering what he's going to do next: "Warm steaming water - tired limbs - presently a shave - a cocktail dinner. And after - ?" He dies during the dinner.
Animorphs is full of this, usually in the form of remarks the characters make. Read the series. Then read it again. You will be amazed. Here are only a select few examples from only the first book:
Marco: "We'd be totally famous. We'd get to be on Letterman for sure." At the end of the series, they're practically the most famous people on Earth. Marco not only gets on Letterman, he even gets his own show.
Visser Three: "[...] And then I'll be Visser One." He does get promoted to Visser One near the end of the series.
Jake (as narrator): "I think maybe the Andalite meant even more to Tobias than to the rest of us." Elfangor, the Andalite in question, is later revealed to be Tobias' father.
Marco: "Maybe it's your own brother you'll end up destroying." Jake: "Yes, maybe that's what will happen." Jake ends up ordering his cousin to kill his brother.
Jake: "Tobias! Get a grip. Don't start eating mice just because you're in a hawk's body. What's next? Roadkill?" Tobias ends up eating mice exactly because he gets stuck in a hawk body. He also resorts to roadkill when he has bad hunting luck.
Cassie: "What are we going to do with dolphin morphs?" They acquire dolphin morphs shortly after, and use them on quite a number of underwater missions.
Jake (at Tobias): "Too late for you to morph back now." Uttered in reference to the strategic situation, right before Tobias passes the time limit and gets stuck in his hawk body.
Also done without words in the first book. Tobias is the one who has the deepest connection with Elfangor, who stays with him the longest. He does not know why, but we find out why in The Andalite Chronicles, with the parental reveal.
The Ellimist Chronicles begins and ends with the Ellimist visiting a dying Animorph. He admits that he did not cause him/her to be an Animorph, and that it was random chance. According to Megamorphs 4, this means that this can only be Jake or Rachel. It turns out to be Rachel.
Most of the information about Z-Space's finer workings comes from the books narrated by Marco. Marco's Dad is the first human to discover the existence of Z-Space and build a transmitter.
During an early interview with one of the witnesses, Jack just assumes the bank robber to be a male, prompting the question, "What, so only men can be bank robbers?" Basically handing the "twist" to the reader on a silver platter. The bank robber is a woman. Also note that the narration never actually refers to the bank robber as "he" or "him," just "the bank robber.
While talking to Anna-Lena and Julia in the closet, Estelle snoops in one of the chests and finds some bottles of wine. She says that she would do the same thing in her own home. It is Estelle's home. This is also foreshadowed in her confidence that the fridge still has food in it, even though the apartment is for sale.
In the last book of Artemis Fowl, when watching Gobdaw's soul move on to the afterlife in bliss, Artemis wonders when that happens to them, if they would react the same.
"The Callistan Menace": Whitefield tells a story about Magnet Worms from Europa. They're little things (about six inches long) that can manipulate magnetic fields, giving them the power to kill from a distance. Knowing how the Magnet Worms work gives the crew a solution to the unnamed Callistan Menace.
"The Dead Past": Potterley's distaste for cigarettes is a reference to his past; he may have left a lit cigarette that caused his house to burn down and kill his daughter.
Foundation Series' "The Mule": Several plot twists are implied or stated explicitly before they become clearly revealed. The Mule being a Mutant is mentioned as early as the fourth chapter. Guesses that the Seldon Plan cannot account for those is mentioned soon after and they get paid off in "Fall of the Foundation". Ebling Mis makes some guesses about the Mule's physical appearance, in contradiction to Magnifico's description, during "The Search Begins". Which fleets are defeated in a Curb-Stomp Battle, and which win against the Mule, are a clue to his Psychic Powers and alternate identity. Even the Mule's manipulation of Toran is apparent once you know what you're looking for, but appeared to be natural in the original context.
Early in Aunt Dimity Goes West, Bill marshals many arguments to convince Lori to vacation in Colorado with the boys and Annelise; among them, he cites the many wonderful activities available to the boys and says, "They'll have a tale or two to tell their friends when they start school in the fall, that's for sure." Yes, and some of those tales will prove more exciting than even he bargained forso exciting that they prompt the school's headmistress to summon Bill and Lori for a conference early in Aunt Dimity Vampire Hunter.
In A Bad Day For Voodoo, after Adam gets a voodoo doll made of Tyler to ensure that he won't tell the cops about the voodoo doll Adam got made of Mr. Click, Tyler asks him how he paid for another one when they cost 80 dollars, since Adam was out of money. Adam doesn't answer. As it turns out, Esmeralda the doll-maker made the doll for free because Adam is The Chosen One.
Genesis 3:15 'he will crush your head, and you will strike his heel.' If you're Christian, this is foreshadowing to Jesus punishing Satan (the snake) ... a few thousand years before he was born.
As well as Isaiah, Jeremiah, and every other prophetic book. This is to be expected, considering the nature of what a prophecy is.
In addition, many Old Testament events are similar to events in the New Testament.
The 2003 BIONICLE book Tales of the Masks is full of foreshadowing, hinting at a mysterious, forgotten past and an ancient city called Metru Nui. The following two years focused entirely on this. Later, in the '05 book Time Trap, Toa Vakama received a vision that faintly hinted at the '06 storyline.
Earlier than that, the Bahrag queens in the 2002 book Beware the Bohrok compare their minions, the titular Bohrok to the Toa heroes, calling them their brothers. Some years later, it's revealed that the Bohrok and the Barhag weren't evil at all, they had only been serving the will of Physical God Mata Nui, the same as the Toa. Later still, we learn that the Bohrok were once Matoran, the same "species" that the Toa belong to.
Lucy Pavlov of Blonde Bombshell decides that her amnesia of everything past five years ago is either the work of her enemy or something she had done to herself, with good reason. Turns out it's because she's not actually human, but a bomb.
In Broken Gate, this is rather subtle at first, but it can be seen with Nezumi's surroundings being dismal and her Floral Motifs being lycoris flowers, a flower being associated with death and despair, however, it becomes more obvious when Miyako's "GO! Go and never return but, remember, if you seek her out, then you will have killed her." If any of those things aren't indications, this story has a Downer Ending.
Carmilla: The evening Carmilla is taken in at the schloss, Laura, her father and her two governesses go for a walk in the moonlight, and Madame De Lafontaine opines that the intense moonlight indicates "a special spiritual activity", and underpins her claim by remarking that the windows of the schloss reflect the moonlight "as if unseen hands had lighted up the rooms to receive fairy guests". She also tells a story of how her cousin on a moonlit night dreamt of "an old woman clawing him by the cheek", and woke up with "his features horribly drawn to one side" and "never quite recover[ing their] equilibrium." Moments after, a troupe of (so we must assume) vampires stages a carriage crash in front of the schloss (vampires are ghosts, i.e. spirits, hence "a special spiritual activity"); Carmilla is taken in at the schloss (a "fairy guest" received); and finally Laura is attacked (physically and figuratively) by Carmilla, and, like the cousin's face, never recovers her former balance again.
Bokonon tells the protagonist of Kurt Vonnegut's Cat's Cradle what he would do if he were "a younger man"...such as the protagonist. It is heavily implied that John does exactly what Bokonon says. We know for a fact that he does part of it by the end of the book.
Among the various examples in Cerberon is this gem: When George and Cerberon are discussing what to do with the bodies of two highwaymen they had just killed, Cerberon asks, "Shouldn't we bury them?" to which George replies, "No. Leave them for the carrion birds. Maybe they can carry their wretched souls up to Heaven." Later on, they meet a family of skraad, human-sized intelligent avian carrion birdswho can lead lost spirits on to their afterlife. In an interesting Call-Back to George's foreshadowing statement, one of the skraad tells another character, "There is nothing in the sky for the soul. It returns to the Source and the body nourishes more life."
In the first chapter of Dead Souls the author mentions that Chichikov (the protagonist) is able to talk about custom officials "as if he had been one of them". Much later we'll learn that this has indeed been the case - and that he tried a big smuggle operation, which almost would've made him a rich man.
Also in The Bishop's Heir, Dhugal is found to have very strong shields which no one can account for in his known heritage. Kelson's mental touch is unbearably painful, Morgan's less so, and Duncan's even less. This makes sense later when it's revealed the Duncan is Dhugal's father, which makes Morgan also a blood relative.
Early in The Quest for Saint Camber, Rothana asks Kelson to help encourage a love match between his squire (soon-to-be knight) Jatham Kilshane and the Princess Janniver. At the time, Kelson teases her about playing matchmaker, and she will do so again two years later for Kelson himself.
The morning after Duncan reveals himself as Deryni by showing his aura while bestowing Dhugal's accolade, Arilan gives him a severe reprimand for doing it without discussing it with him and Cardiel. At one point, he says, "It could be worse, I suppose. You could have done it at the altar, in full pontificals. Now, wouldn't that have been a coup?" A couple of years later, Duncan will do exactly that, consecrating a new altar by extending his aura over it, with an archbishop standing at each elbow, and again while elevating the Host and the Chalice in the celebration of the basilica's new Camber chapel's first Mass.
In Destined to Lead, Resurge mentions that a 'game' wouldn't be so fun if someone breaks an arm. Later on, guess who ends up breaking a few ribs? In book one, Kajiya encounters a spiede, in book two- she gets captured by them! (Even more subtle, the first cave had jagged walls as opposed to the second's smooth ones, signifying it was unused by spiedes, the first speide was there as a messenger for the Big Bads!)
Several people mention offhandedly the Grey Angels, part of local lore used to scare people into behaving prudishly. They're said to come down to Paradise on Crusades to cleanse the world of sin. Guess if they turn out to be real.
Raguel's decision to go to Providence in the prologue, Violette's talk of "higher mysteries" and Longeau babbling about Fate Worse than Death awaiting followers of the Garden all build up to The Reveal that Garden's highest ranks are in cahoots with Raguel.
Bogardius' deteriorating health, silence in the north of Providence and strange behaviour of the few people encountered there foreshadow the nature of a Grey Angel Crusade.
Early in Wyrd Sisters, Granny Weatherwax says "You'd have to be a born fool to be a king." By the end of the book, the court Fool has become the king. And not only that, he is a 'born fool'—his father and grandfather were Fools before him.
A similar one was used later in Men at Arms. It's stated that you'd have to be a fool to try breaking into the Assassin's Guild. The perpetrator actually disguises himself as a fool to do just that.
Characters in previous City Watch books remark that there's no reason why the older but perfectly healthy Lady Sybil shouldn't be able to have children. It still takes her husband the whole length of The Fifth Elephant to get the happy hint.
In Thief of Time there's a weird little section where Lu-Tze cuts off a Yeti's head in order to show Lobsang their ability to manipulate time and avoid death. It seems sort of out of place, especially considering they're supposed to be in a bit of a hurry to get to the city, until Lu-Tze says "I hope I'm never that desperate," at which point you are absolutely, without-a-doubt certain that by the end of the book he will be. Of course, this may also just be an example of The Law of Conservation of Detail.
More cryptically, Death in the same novel is unable to see Lobsang Ludd. This appears to be hinting that Lobsang is immortal, until Fridge Logic reminds the reader that Death has seen plenty of other immortals before. The real reason turns out to be far stranger than that: Lobsang's life as an individual isn't destined to end with his death at all; instead, he ceases to exist as Lobsang when he merges with his other self, Jeremy Clockson.
Strappi: Hands off—well, you lot wouldn't be able to find them anyway—and on with socks!
It's funny because Polly had just received a pair of socks from an unknown benefactor to help her more convincingly pass as a boy. By the end of the book, it's revealed that every member of their squadron, even Sergeant Jackrum, is a woman in disguise. And Jackrum was the one who gave Polly the socks, which quickly caught on.
In the beginning of Inferno, Virgil tells the protagonist about how Jesus came to Limbo and took many of the Jews up into Heaven, including Adam. Two thirds of the way through Paradiso, our protagonist meets Adam as he describes how long he had to wait in Hell before being saved.
In the fifth canto, one of the lustful mentions her husband-murderer will be punished in a part of Hell called "Caïna." It takes until the 32nd canto for Dante to arrive there and see that it's a region of the final circle where the traitors of family are punished.
Halfway through Inferno, Virgil explains that all the rivers of all deposit at the bottom to form Lake Cocytus, but stops describing it since they'll get there later. Needless to say, the last circle damns traitors to suffer in the bitterly frozen Lake of Cocytus.
One of the gluttons in Purgatory mentions his sister has ascended ahead of him into Heaven. Surely enough, the first person Dante talks to in Paradise is Piccarda, sister of the glutton.
Dragaera: A very coy example appears in Phoenix, in which Vlad asks Loiosh if Rocza is pregnant in passing. This seems innocuous at the time, except that Loiosh replies that Rocza isn't pregnant, but is "a little closer to Cawti". Turns out that Vlad should have been asking Cawti whether she was pregnant.
In the Drenai novel Waylander II: Morak, while weighing the benefits of betraying and murdering Belash, worries that he is strong enough to ignore a fatal stab wound long enough to kill Morak regardless. Later on, Belash takes out the leader of the Dark Brotherhood in exactly this manner.
Multiple books foreshadow the death of Harry Dresden. Prominent examples include Quintus Cassius' death curse: "DIE ALONE!", and the tombstone Harry was given as a threat by Bianca. Its epitaph: He died doing the right thing. It's not wrong.
In Summer Knight, diminutive, nervous changeling Fix wales the tar out of Lloyd Slate, who would be well out of his weight class even were he not the powerful Winter Knight, with a wrench. By the end of the book, Fix becomes the new Summer Knight, designated opponent to the Winter Knight.
Early in Blood Rites, when Harry returns the box of stolen Foo dog puppies to Brother Wang, the monk mentions that not all of the puppies are there. Since Harry finds one of them, who he dubs Mouse, hid in his car, it seems that's all... except that much later, in the short story "Zoo Day", Mouse meets his Evil Counterpart older brother, who along with Mouse's elder sister were stolen by dark forces before Harry retrieved the dogs, implied to maybe be Cowl and Kumori.
In Dead Beat, when Harry is being tortured by Cassius, he uncharacteristically convinces himself that he'll be saved by divine intervention, hoping for the appearance of one of the Knights of the Cross. Instead, he's saved by Waldo Butters, one of the least likely heroes imaginable. Eight books later, at the end of Skin Game, Butters takes up the sword Fidelacchius to become one of the Knights.
In Ghost Story, when Skaldi Skjeldson, one of the Einherjar, asks Butters when he's going to enter the sparring ring, his response is "About five minutes after I get a functional lightsaber." Come the climax of Skin Game, Butters gets exactly that in the form of the reforged Fidelacchius.
Rudolph's Reckless Gun Usage gets brought up early on. Murphy later talks about basic gun safety with the volunteer fighters, stating that rule one is "Don't point your weapon at something you don't want dead." Murphy winds up dying as a direct result of Rudy's piss-poor trigger discipline when he has a pistol aimed at her.
When discussing how to crack Ethniu's defenses, it's mentioned that sufficient angelic power would be able to pierce Titanic bronze. Mab mentions that sufficient infernal power would have the same effect and that Nicodemus Archleone might be able to manage it. Sufficient infernal power winds up doing the trick. Only the Denarian in question is not Nicodemus, but John Marcone, who has secretly had Thorned Namshiel's coin since the end of Small Favor.
Earth Girl mentions that all planets colonized by humans have, in part, been chosen because their stars are less active than the Sun, as solar activity interferes with the Portal Network connecting humanity. Now, take a wild guess as to what the cause of the Handicap, which makes those who have it unable to live on any planet other than Earth, is revealed to be in Earth Star.
A rather interesting example shows up in Elantris. Near the start there is a mention of Hrathen as the savior of Arelon, which most simply put down to simply stating his thoughts. It isn't until the end that you find out that Hrathen defects when he realizes how evil Dilaf is, and then sacrifices his own life to kill him, saving the entire joint population of both Arelon and Teod from being annihilated by the Derethi cult. One of the other main characters even says that he was their savior, calling back to the original line.
In Dale Brown's Fatal Terrain, Brad Elliott says that he "always thought I'd buy the farm in the cockpit of a B-52 after just saving the world from thermonuclear meltdown". Guess what...
In The Fault in Our Stars, when Hazel, Gus, and Hazel's mom are on the plane, it's mentioned that Hazel and Gus pushed the play button on their movie simultaneously, but Gus's movie started before's Hazel did. This foreshadows that Gus dies later in the book: just like his movie starts first, his movie, i.e. his life, ends first.
In Fiasco, Parvis meets with a friend of Pirx's who says they are quite similar to each other, they have the same eyes. What he actually means is psychological similarity, but later in the story, Parvis-or-possibly-Pirx is being rebuilt with bits and pieces of other people, possibly including Pirx (or maybe Parvis). Yeah, bit squicky.
Happens throughout the second part of Foundation and Empire, this part of the book being full of situations that not only hint the powers of The Mule but also wouldn't have been possible without them; the casual reader passes by without noticing anything out of place, is only when you have completed the book and start rereading it that everything makes sense.
In FoucauldsPendulum, the narrator and his skeptical girlfriend discuss how the four Gospels might have started out as a literary exercise that accidentally turned into the holy texts of a new cult. Before the story is over, the protagonists have unwittingly started exactly such a cult themselves.
Early on in The Giver, we learn that Jonas' younger sister Lily has a stuffed toy elephant as her "comfort object", and that she believes that elephants are imaginary creatures that never existed (when he was little, Jonas had a bear, which was also supposedly imaginary). Much later in the book, Jonas receives a memory of an elephant being killed for its ivory by poachers. This is a major step in Jonas learning about the lost memory of sorrow, and it makes him realize just how much of the old world people have left behind.
A man that Nick dubs "Owl-Eyes" wrecks his car. Guess what happens with another character involving a car?
Tom Buchanan was involved in a car incident previously with a chambermaid in the passenger seat, revealing his infidelity. Another similar car incident later on in the book reveals adultery.
The lovely thing about the Haruhi Suzumiya novels is the anachronistic order which it's presented. There are foreshadows almost everywhere. For example, in Snow Mountain Syndrome, Kyon casually mentions a crazy ex-classmate who wanted to confess to Nagato. In the next novel, there's a story about it. The best foreshadow was from the first book, Melancholy, where Kunikuda mentioned that Kyon liked strange girls, and Kyon protests, claiming that she was just a good friend, and nothing more. In the ninth novel, Sasaki is introduced, and she IS strange enough to have her own anti-SOS Brigade.
A truly hilarious example in the first novel. When Haruhi decides to recruit (kidnap) Mikuru into the (then unnamed) SOS Brigade, as Haruhi runs off to retrieve her, Kyon jokingly wonders if Haruhi had finally found an alien. Having run into Haruhi as she was leaving the club room, the next paragraph (only a sentence long), describes him entering the room. The very next line after that is, "Yuki Nagato was already in the club room." (From the English translation)
Heralds of Valdemar: In Brightly Burning, Kalira is wounded by an arrow, and seeing her injury motivates Lavan to become a better pyrokinetic. In the finale, she is killed by a crossbow bolt, and Lavan's resulting anger burns a forest down.
Mr. Sir tells the kids that "This ain't a Girl Scout camp". At the end, when Camp Green Lake is shut down, it actually does become a Girl Scout camp.
Elya tries and fails to find Madame Zeroni's son in America, but admits that he has no clue what he'd do when he did. What, carry him up a mountain and sing the pig lullaby to him? Took several generations, but that's exactly what happens with Elya's great-great-grandson and Madame Zeroni's great-great-great-grandson.
Matthew Reilly's Hover Car Racer has several bits of foreshadowing for important races. In professional races, the steering wheel is the only part of the car required to cross the line to finish the race if the car crashes close to the line (except for a particular race, and this becomes important too). Jason has dreams about blacking out on Liberty's Elbow (a tight hairpin turn around the Statue of Liberty). The Bradbury Principle is mentioned a couple of times before it happens.
Catching Fire contains two. Katniss has a dream that essentially depicts the epilogue and the resolution of the love triangle is foreshadowed when the characters describe the wedding ritual of District 12 which includes the couple starting a fire and toasting a piece of bread. Take one guess as to whether the girl on fire ends up with the boy with the bread or with the other guy.
In The Hunger Games, she first notices Rue in training while practicing with spears. In the Games, Rue is killed by a spear.
The first time Gale appears he's holding a piece of bread pierced by an arrow. Foreshadowing that Katniss will choose the boy with the bread. Tough luck to foreshadow that you'll be the Romantic Runner-Up.
In The Hunger Games, Peeta explains to Katniss that he wants to die as himself and not to be turned as a monster, and to show to the Capitol that he does not belong to them. It is cruelly ironic when you know that in Mockingjay, he is submitted to painful torture and brainwashing which turns him into a "mutt" eager for killing Katniss.
Hurog: In Dragon Bones, Oreg, who is a magically bound slave, whose life is connected to castle Hurog, and a ring which Ward inherited, tells Ward about the time when he annoyed his then master so much that the man had him whipped - by someone else. Oreg points out that, had his master himself beaten him, he would have run the risk of killing him (which would have been what Oreg had planned, his unlife was that miserable). Only the wearer of the magic ring can kill Oreg, otherwise he's immortal. Some time later, they all have become traveling adventurers, Ward finds a man with a painful stomach wound, and puts him to death, using a specific method that kills immediately and painlessly. He later kills Oreg, as this is the only way of preventing the eponymous dragon bones from falling into enemy hands. It turns out that Oreg had planned his Heroic Sacrifice for a long time before Ward realized he would have to do it.
In Dostoevsky's The Idiot, Nastassya Filippovna makes a comment about Rogozhin becoming consumed by his passions and ending up being exiled to Siberia. Much later on, Rogozhin murders her...and is sentenced to fifteen years' hard labour in Siberia.
In the Inheritance Cycle, Eragon at one point asks Brom what his mother was like. Brom describes her as proud and dignified, which led to her downfall, but also willing to help others. Fridge Logic kicks in when you realize that Brom was an outsider to Carvahall who shouldn't have known this. When we are told that Morzan was Eragon's father, that makes even less sense; why would Brom say that about Morzan's consort? How could he have known she had a nicer side. In the third book, we get an answer: he and Selena had fallen in love and conceived Eragon.
In the first book of Kane series, Darkness Weaves, Kane mentions offhandedly that later copies and transcriptions of Alorri-Zrokros's Book of the Elders can be deadly because of errors and omissions. Which comes to bite him in the next book, Bloodstone.
In The Kite Runner, Amir reads Hassan a story about Rostam and Sohrab. Rostam kills Sohrab in battle, not knowing that Sohrab is his son. Later in the book, Amir blames himself for Hassan's death, and learns that he was his half-brother.
Laxdæla saga: In Kjartan's swimming contest with King Olaf, Olaf pushes Kjartan under water three times. This is a foreshadowing of Olaf bringing about Kjartan's conversion: In medieval baptism ceremonies, adults were submerged in water three times.
Liv in the Future: Alixs gaze briefly lingers on the body of Braeyleighe Smmythe, the girl whose Unizon watch Liv takes. Later on, Liv's looking through records at the library and learns the two of them grew up in the same orphanage.
The Fellowship of the Ring has this ironic example: Frodo says, "So far, my only hope has been to get here [Rivendell]. I hope I shan't have to go any further. ... I have had a month of exile and adventure, and I find that has been as much as I want." Guess what the next two books are about?
Also in Fellowship, Elrond says to Boromir, "Slow should you be to wind that horn again until you stand once more on the borders of your land and dire need is upon you." The next time he uses the horn, just before his death, fits these circumstances perfectly.
Early on, Frodo finds that he cannot cast the Ring into his own fireplace. Ultimately, Frodo is unable to destroy the Ring when he reaches Mount Doom.
Sam mentions that his cousin once spotted a walking tree in the Shire, but his tale is considered unbelievable. Much later on, Merry and Pippin run into Ents, who are in essence walking trees.
Just before the Fellowship leaves Rivendell, Aragorn is noted to be unusually pensive and that only Elrond knew what this moment meant to him. It's later revealed that this journey and Aragorn's goal to reclaim Gondor's throne was an Engagement Challenge for him to marry Arwen.
Lord Peter Wimsey: In Busman's Honeymoon, Peter and Harriet arrive at their honeymoon cottage and send Bunter to knock loudly when nobody lets them in, saying 'Wake Duncan with thy knocking'. This is what Macbeth says when Duncan is dead (Wake Duncan ... I woulds't thou coulds't). The person being knocked for is dead.
Vahenz' messages to Liozh Zai repeatedly state that Shuos Jedao has his own plan and that it's not necessarily aligned with Kel Command's plans. Additionally, during the first attempt to cross the invariant ice shield, Jedao has Cheris send a message claiming that he's working against the Hexarchate and wants to join the rebels. Of course, it eventually turns out he has a plan to bring down the Hexarchate (though not with the Liozh).
The Hafn are mentioned several times as the most likely reason the Kel Command isn't reinforcing Cheris' forces. While Kel Command's reasons are different, the Hafn do become a major problem in the second book.
Originally, each Magic School Bus book ended with Ms. Fizzle setting up classroom decorations and donning an outfit relating to the subject of the next book. (eg, the book preceding the class' trip inside a hurricane ended with her displaying weather-measuring equipment and wearing a dress boasting stormy imagery.) Series Fauxnales had Ms. Frizzle wear a dress covered in question marks on the last page.
MARZENA: In Book One, on the first meeting between Lauren and Marian, Lauren has some weird feeling of déja-vu, a weird itch, like she's already seen Marian in a magazine or something, but she can't recall what exactly. Sure enough, we later learn that Lauren is really an Anti-Manchurian Agent briefed for a mission where she would need to get close to Marian, so that her Traumatized brain could absorb Marian's personality therefore cloning the Alpha Bitch's brain.
Jack McDevitt really likes to do this before killing off any vaguely important characters. When he starts talking about how one character will think back to this moment, later, it's often because it's the last time they'll see another character alive. He's deliberately not very subtle about it.
Midnights Children takes this Up to Eleven, possibly even to the point of parody. The Framing Device is a narrator writing his autobiography, but he acts like a literature student performing a deep reading of a work, and excitedly references future events whenever he notices something significant. May even overlap with Doomed by Canon, as the narrator will sometimes spoil future events outright (particularly the deaths of certain characters).
In Moby-Dick, the landlord of the inn at the beginning of the book is named Peter Coffin. At the end, Ishmael survives by clinging to a coffin.
In City of Bones, Simon makes a joke about Jewish Vampires. That's exactly what he ends up becoming in City of Ashes.
Witchlight stones will only illuminate in the hands of those who have angelic blood, and are thus typically only used by Shadowhunters. However, when Alec drops his, Magnus picks it up and it proceeds to glow, albeit in changing colors rather than pure white. Magnus's father, Asmodeus, is not one of the demons spawned by Lilith, he is a Fallen Angel, one of the ones that originally rebelled against God.
Early on in The Mote in God's Eye, there is an extensive discussion of how an intelligent species can't evolve further, since much of the species' efforts go to eliminating selective pressures. Guess what the main characters discover a few chapters later?
In The Mouse Watch, Bernie watches a training video for the titular Heroes "R" Us team that shows text messages from agents, one of which reads "Need more intel on something called KRYPTOS. Please advise." "Kryptos" is eventually revealed to be the leader of R.A.T.S., the Nebulous Evil Organization that the Watch spends much of its time fighting.
Myth Adventures: In Myth-Chief, Aahz and Skeeve are competing over who gets to be the new president of M.Y.T.H., Inc. Early on, Nunzio accidentally calls Bunny "boss", foreshadowing who eventually gets the job.
As early as the first novel, Arthéon considered the possibility of the Soulless forming their own faction. It ended up actually happening a little before the fourth novel rolled in.
The third novel had a potion that disguised the Noob guild into Coalition players by changing the cursors, which are color-coded depending on in-game factions, from the Epire yelllow to the Coalition red. Gaea's cursor turned red for real between the third and fourth novel.
In the second novel, it's repeated several times that Sin, at the time assumed to be some kind of ancient artifact (he's actually a Source, basically a god), is supposed to be stronger than Lys and Ark'hen (Olydri's founding Sources) taken to together. Not only are the two basically his parents, but the fourth novel reveals that Dortös (another Source that live in Olydri) pitched in for his "conception" also.
In the third novel, upon finding out that Master Zen, the founder turned evil of the Noob guild, started a new guild in his new faction, Omega Zell sarcastically asks him if he called it "The new Noob guild", "Return of Noob guild" or "Noob guild two". The fourth novel starts with the Noob guild disbanded and getting restarted by Sparadrap. The chapter depicting the latter is titled "The new Noob guild".
The third novel has some members of the guild crack a couple of Nerds Are Virgins jokes at Arthéon, who replies that his love life is going perfectly fine. The fourth novel starts some time after the end of his relationship with Kary.
The third novel has Spectre call Tenshirock "his old friend", long before Tenshirock's past was revealed in Season 5 of the webseries version of the story.
The fourth novel has Mist hesitate to join Justice without Saphir's explict approval, as the latter is in charge of recruitment and another member of the guild than her is inviting Mist to join. The webseries and comic versions of the story have revealed that Mist and Saphir are sisters since the publication of the novel in question.
Two notable examples occur in John Steinbeck's Of Mice & Men. In the very first scene, George complains about how Gentle Giant Lennie always accidentally kills his pet mice. About halfway through the book, Carlson shoots Candy's dog. Both of these nicely build up the drama of the last chapter.
The whole book is dripping with foreshadowing if you know where to look.
Used somewhat comically in One Fat Summer. After his first successful day working for Dr. Kahn, Bobby comes home sweaty and exhausted, immediately crashing in his bed. Half asleep, he dreams that his fat body is melting into the sheets and he wakes up as a skinny, good-looking version of himself. Come the end of the book, after a full summer of hard lawn work and abstaining from binging on junk food, Bobby has indeed become visibly slimmer, though it takes a few characters telling him for Bobby to realize it. Followed through in the sequel where he apparently not only kept the weight off, but slimmed down further much to his delight.
One Of Us Is Lying: When investigating Simon's online persona, Anarchi SK, Maeve finds a 4Chan post where he criticised the perpetrator of a recent school shooting on their lack of originality. He invites people to surprise him when they "take a bunch of asshole lemmings with them." This foreshadows that his murder was actually suicide, designed at ruining other people's lives in the process.
In The Osmerian Conflict, Marina's true identify is foreshadowed through a series of events. Firstly she never interacts with any Silician. Secondly she is found alone twice speaking to herself in a language not Terran. The third bit take a bit of a Genius Bonus in that a medic administers a test and says her tissue is highly dense and lacks any form of Silicon.
In the first chapter, there's Lord Maccon telling Alexia that if the moon had been full even he would have attacked her, and wondering to Professor Lyall why she doesn't get married. Later on, the villains throw her into a cell with him at full moon to determine her Power Nullifier abilities, and he does attack her before she gets in contact with him. And as for married...
During Alexia's conversation with Queen Victoria, it's mentioned that vampires in particular have very strong taboos about getting into relationships with preternaturals.
During the meeting of the Shadow Council, Alexia finds it odd that the potentate asks her if she's feeling well and if she's had any stomach ailments, and later on Professor Lyall overhears some rather interesting conversation from two Westminster vampires lurking outside Lord Akeldama's for Alexia to emerge. Then there's the poisoned meal on the dirigible intended for her... almost as if the vampires are highly concerned about Alexia getting pregnant.
Connected to the above, the potentate makes a cryptic remark about the fact that preternaturals are only the second-worst creature in the world to vampires, and when Alexia asks Conall about this, he mentions that there's an ancient myth about something terrible that werewolves call a "skin-stealer", but the details are lacking. Let's just say that the both of them are going to find out first-hand exactly what that is, and soon.
Lord Maccon mentions that there's only one vampire hive left in Egypt, the Ptolemy Hive in Alexandria, only six vampires strong. Come the fifth book, they play a major role.
Percy Jackson and the Olympians: In The Last Olympian, when Percy is trying to determine the most strategic location for his one mortal point, he chooses the small of his back in favor of an armpit, being more dignified. Anyone want to guess where Luke's body's Achilles spot is?
Early in the book, when Jane is ill, Darcy and Elizabeth discuss the eventuality of Mr. Bingley suddenly leaving Netherfield at a friend's request. Darcy thinks it would be a lack of character to yield so easily to a friend, and Elizabeth thinks it's perfectly natural to be influenced by those who are dear to you. Guess who changed their opinion when Bingley does leave Netherfield in a hurry at his friend's request?
About halfway through, Elizabeth says to Darcy, "I had not known you a month before I felt that you were the last man in the world whom I could ever be prevailed on to marry." He is.
Professor Mmaa's Lecture: In a one-off gag, the termite student Nonobody wonders what are the chances that an auspicious miracle, such as an earthquake or another cataclysm, would happen before the professor asks him for his homework. Guess what happens near the end...
Robin Hobb's Realm of the Elderlings: In Assassin's Quest, the character Kettle is part of a group who's looking for the White Prophet, and says with respect to their search "Perhaps it is a fool's errand that I go on." The White Prophet turns out to be the Fool.
In the first Redwall book, Cluny had a nightmare where he was being chased by Martin the Warrior, and as the sword "struck" him, he was woken up by a giant bell. His final battle is in the bell-tower, where Matthias uses Martin's sword to chop the rope keeping the bell up, and it lands on Cluny.
The Reluctant King: In the beginning of the third book, Jorian tries to see if he can spot a Paaluan Dragon while they're flying over the Moru Swamps. When they enter the swamps much later in the book to recover the Xylar Crown, an actual Dragon shows up.
In Conspiracies, Repairman Jack encounters the Twins, agents of the Ally who are the basis for that Verse's "men in black" rumors, and are noted for driving around with their headlights off. After his attempt to get away from the pair causes their deaths, Jack vacates the area, driving away in the dark with his headlights off. Guess whose job he just inherited?
In the first chapter, Mark narrates "While I dont know if my future family would involve babies or kittens crawling around our feet, thats all in the hands of genetics, and you cant fight nature." He ends up with Lucy, a feline/human hybrid, by the end of the story.
Also in the first chapter, Mark's narration says "One false move, just upsetting the wrong natives, and this jungle could rain spears or bullets, neither of which would be significantly slowed by a veritable wall of foliage." He later ends up getting shot at, with a tree in between him and the bullet, ending up with wood shrapnel embedded in his leg from the tree trunk exploding.
In Shiver, while Grace is buying a new car Sam jokes to Grace that if the car "hit a deer it would just hiccup and keep going". Much later the car does in fact hit a deer and breaks down. To make matters worse, without the car heater keeping Sam warm, he finally shifts permanently into a wolf but not before tearfully saying goodbye to Grace and Beck.
The Sister Verse and the Talons of Ruin has this pretty much everywhere, either directly or through metaphor. If something happens, it's probably been hinted at earlier in the story, particularly through the hallucinations of the characters under the Lord in White's influence.
One example, right from the start: Lord Eddard Stark, on his way back from an execution, finds a direwolf (the symbol of his house) killed after being run through with the horn of a great stag (the symbol of House Baratheon). Sure enough, the coming of his old friend Robert Baratheon leads to the crippling of his son, the outbreak of civil war in Westeros, and his execution. It's also an example of in character foreshadowing: everyone else gets really uncomfortable when they see it, and his wife Catelyn wishes he would put more stock in its meaning.
Beyond the Wall, Jon Snow is told a tale about his ancestors that involved two people hiding the crypts of Winterfell so well that no one found them. Guess how Bran, Rickon, and their group survive the Greyjoy-Bolton attack on Winterfell.
The Spirit Thief: In the third book, Josef's narrative makes a passing reference to him having fencing tutors in his childhood - something only a very rich noble family would be able to afford. In the following book, it's revealed he's a prince.
In the Sword of Truth novels, the best example is in the sixth book, Faith of the Fallen. Right after Nicci forcibly takes Richard prisoner and right before he leaves with her to the Old World, Kahlan tells Richard that he should "Carve something to make Nicci see that you should be free." Richard dismisses this as unnecessary and silly. At the climax, when Nicci sees the statues on the cover of the book that Richard carved, she has an epiphany, sets Richard and Kahlan free, and pulls a HeelFace Turn.
In the Tairen Soul's first book, Lillis remarks that Ellie (her older sister) '[kisses] pain away better than anyone'. This comes several chapters before The Reveal that Ellie has a latent talent for healing magic, which the Fey theorize she has been using subconsciously all her life.
Near the beginning of the first Tales of the Otori book, Across the Nightingale Floor, Kaede complains about how little of use she's been taught: "I learned embroidery, but you can't kill anyone with a needle." Much later, she kills one of the main villains, with a needle.
In Temple Trouble Verkan Vall is rattling off a bunch of information for a couple pages. Buried in there is the source of the story's problems, the name of the syndicate.
In Terra Ignota, Mycroft gives out names based on characters from the Trojan War to his fellow Servicers in order to preserve their anonymity. He names one of them Outis, which is not part of the mythos and is later revealed to mean "no one" in his native Greek. "No one" as in "anonymous". Since Mycroft never planned to stay the Anonymous for long, he already had a candidate to succeed him ready, which "Outis" does at the end of The Will to Battle.
In Lost In a Good Book, second of Jasper Fforde's Thursday Next series, pairs of amusingly named agents appear throughout the novel. Examples include agents 'Kannon' and 'Phodder', and 'Lamm' and 'Slaughter'. These names foreshadow their inevitable horrible deaths.
Jack London's short story, "To Build A Fire", is most frequently used to teach this trope in high school English classes. The reader knows the main character's a goner long before he does.
The novel To Kill a Mockingbird spends an entire chapter detailing local racist Bob Ewell's attempts at getting revenge on everyone he blames for being outed as a liar (he had beaten his daughter after catching her trying to seduce a black man and forced her to accuse the innocent man of rape. Despite evidence of his innocence, the man was convicted and fatally shot trying to escape.), stalking the man's widow, the trial judge, and explicitly threatening the man's lawyer, Atticus Finch. In the next chapter, as Atticus' children prepare to go to a Halloween party, their aunt mentions an uneasy feeling, "Something just walked over my grave". The children are viciously attacked by Ewell on their way home, and it is all but stated that they would have been killed had someone not heard their screams and come to help.
When Atticus, who has made it clear that he is adverse to violence, goes out into the neighborhood to "take care of" the rabid dog it foreshadows both his battle against the legal system and the climax of the book.
In The Traitor Son Cycle, the topic of organizing a tournament gets mentioned occasionally as a preamble to a discussion on more pressing matters or as an offhanded "he has responsibilities as a nobleman" scene. In book three, this tournament becomes the focal point of the story.
Done rather badly in Twilight: Bella says something like "nobody's gonna bite me" in the first chapter. If you already know that the book is about vampires, which the back cover explicitly mentions, then this is pretty blatantly obvious.
There are several hints about Blackmail being Sir Pryce and Sam being Mizzamir's son. Blackmail is from Kwartz, Sir Pryce's country, and defeated when a paladin whom he's fighting prays to Sir Pryce for aid. Robin, while looking at a painting depicting the youthful Mizzamir, finds his features then look oddly familiar. Because he resembles Sam. Plus the fact that a magical ward reacts to him and he can get a magic mirror to work, which shows he has latent ability inherited from Mizzamir. Also, Blackmail lingers over a mural showing Sir Pryce arguing with Mizzamir. Similar conflict led to him breaking with the Light.
There's a hint also that Nightshade is not a normal raven before he's shown to be Valeriana's familiar. When he gets noticed by Arcie in the woods watching him while they're hungry, his suggestion is they eat Nightshade. He reacts by shifting away while on a branch. While ravens are pretty intelligent, a normal one probably wouldn't understand and react like this. Later he also sticks out his tongue at Arcie in clear mockery.
Vorkosigan Saga: In The Warrior's Apprentice, Miles says at one point that there is almost enough medical data to build him a new body. He needn't have bothered with the almost, for later on, his clone-brother enters the scene.
In Black Legion, Djedhor is more responsive of the two Rubrics and Khayon hopes that he has retained more of his humanity. In the end, however, it's subverted, as it's the less responsive Rubric, Mekhari, that regains his sentience and sacrifices himself to save Khayon.
The Horus Heresy books, particularly early on, seem to be a contest between the authors as to who can foreshadow the Foregone Conclusion best. There are a lot of comments about how space marines fighting other space marines would be unthinkable, gods and religions, particularly malignant ones, are a silly idea, etc etc.
In Angel Exterminatus, Forrix comments that he's always hated a model Warhound Titan Perturabo owned. In Storm of Iron, set ten millennia later, he gets into a fight with one and comes off second best.
Judika and the Secretary react strangely when Beta asks them if the secret heretical society working against the Maze Undue might be the Cognitae. This is because they are Cognitae agents, as are all the Maze Undues staff and graduates.
Grael Magent first appears shortly after Judika tells Beta to turn on her cuff while theyre chasing the telekinetic spy. Later, when Magent is slashed by a Word Bearers cursed sword while rescuing Beta, Judika turns up soon afterward , badly hurt. Naturally, this is because he is Grael Magent, or at least the host of it.
The books which Lupan leaves out for Beta include one of Lilean Chases journals. Lilean Chase was the founder of the Cognitae, again foreshadowing the reveal that the Maze Undue is a Cognitae-run institution.
Alace Qatorzes true name, and her reaction to Beta asking her if there are children in the house, foreshadows the involvement of the Emperors Children.
When Beta complains that she would have trusted Nayl and Eisenhorn if theyd just identified themselves as agents of the Inquisition, Nayl asks Eisenhorn if they do that still. This innocuous comment foreshadows the reveal that the Inquisition has officially declared Eisenhorn a rogue and a heretic, and that he is not acting with their authority.
An excellent example of foreshadowing is The Wheel of Time in The Great Hunt Turak mentions that the Empress of the Seanchan Empire rules from the Court of the Nine Moons, and her favorite daughter is named Tuon. In The Shadow Rising Mat Cauthon is told he will marry the Daughter of the Nine Moons. Guess who the Daughter of the Nine Moons is? To put this in perspective The Great Hunt is the second book in the series, The Shadow Rising is book 4, and The Winter's Heart where Tuon actually enters the story is book 9.
This is in fact pretty much the entire principle behind the Wheel of Time books. That and clothes.
Early on, when Safi and Iseult fight as Back-to-Back Badasses, a Carawen monk hunting them notes that they briefly formed the Cahr Awen symbol, foreshadowing the reveal that they're the latest in the line of Cahr Awen pairs.
Corlant turns the crowd against Iseult by convincing them that she's a Weaverwitch, because like the Puppeteer, she can't create Threadstones. Eventually, it turns out Iseult actually is a Weaverwitch.
When Esme teaches Iseult how Cleaving works, she mentions that the man she's using as an example used to have a Threadbrother, and somehow the magical bond between them survived the Cleaving. At the end of Windwitch, it turns out that Merik's survived his ship's explosion because he's still tethered to his Cleaved Threadbrother, borrowing some of the latter's indestructibility.
In Z for Zachariah, a character tells the protagonist "Ann Burden, you're going to wish I'd never come here." At the time he doesn't seem serious, but turns out to be very right.