[[quoteright:220:http://static.tvtropes.org/pmwiki/pub/images/iamlegend_cover.jpg]]

->''"On those cloudy days, Robert Neville was never sure when sunset came, and sometimes they were in the streets before he could get back."''

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A 1954 novel by Creator/RichardMatheson. Set [[AfterTheEnd after an outbreak of a viral plague]] that turns both living and dead into creatures resembling vampires, the plot follows LastOfHisKind Robert Neville. An immune scientist and survivor, Neville spends his days hunting vampires, scavenging and [[DyingAlone struggling with loneliness]], and the nights being taunted by undead vampires that keep swarming outside his house.

Essentially the UrExample of the ZombieApocalypse genre, though it predates that particular usage of the word "zombie" by 28 years or so, which was first used in ''Film/DawnOfTheDead1978''. It was adapted to film four different times:
* ''Film/TheLastManOnEarth'' (1964) -- starring Creator/VincentPrice.
* ''Film/TheOmegaMan'' (1971) -- starring Creator/CharltonHeston.
* ''Film/IAmLegend'' (2007) -- starring Creator/WillSmith.
* ''I Am Omega'' (2007) -- a {{mockbuster}} of the above by Creator/TheAsylum.

''None'' of these movies used the ending of the original novel: the first (starring Vincent Price) is the only one even close to rest of the story.
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!!This novel provides examples of:
* AdultFear: Your daugher and wife are slowly succumbing to an unknown disease, while you are perfectly fine yourself. Nobody knows what's happening with them and you can only watch as they get worse and worse. Until one day you have to dump your daughter's body into a massive, government-run bonfire due to biohazard. And before you even have any time to recover from that, your wife expires too.
* AlasPoorVillain: [[spoiler:Ben Cortman, suffers an extremely violent death that disturbs Neville.]]
* ApocalypseHow: Around level 3 or 4, depending on how many types of animals aren't affected by the bacteria. [[spoiler:The revelation of coping partial vampires might push it back to level 2. Maybe]]
* BecomingTheMask: [[spoiler:Ruth can't bring herself to hate Neville like the other infected, after spending time with him pretending to be a fellow human survivor.]]
* CannotCrossRunningWater: Neville tests this by constructing a trough to run water from a garden hose in his yard. Cortman sees it and gleefully jumps back and forth over it.
* CutenessProximity: After spending almost two years ''completely alone'' and besieged, Neville encounters a dog - the first non-vampire creature he met in all that time. He keeps on trying to befriend the dog and capture it to lessen his loneliness, acting like a giddy child each time he makes progress.
* DarkestHour: [[spoiler:Neville's handwatch stopped. It's past dusk. The vampires already left their hideouts, while he tries to reach home. Which he left wide open, expecting to return few hours ago]].
* DeadpanSnarker: Despite being completely alone, Neville doesn't stop [[TalkingToThemself talking and thinking aloud]], solely to lessen the pressure of not having any companion.
-->Some things could go to pot, but not his health, he thought. Then why don't you stop pouring alcohol into yourself? he thought. Why don't you shut the hell up? he thought.
* DoingInTheWizard: The mythological traits of vampirism are all defined as either caused by the ''vampirus'' bacillum, or as a psychological reaction to the infected's [[GenreSavvy realizing they've become a creature out of a pulp novel]]. On one occasion, Neville observes a vampire climbing a lamppost and jumping off, and presumes that the individual believed itself to be able to turn into a bat.
* DownerEnding: Neville, due to killing [[spoiler:partial vampires]], is about to be [[spoiler:executed. The spy he fell in love with gives him a suicide pill to end his misery.]]
* TheDreaded: Neville is this to the Vampires. [[spoiler:Even when captured, many are terrified just by the sight of him.]]
* DrivenToSuicide: Few times Robert contemplates just putting himself out of his misery, but one time is especially notable. [[spoiler:After he barely makes it home alive, which was trashed in the meantime by the vampires, he suffers a HeroicBSOD. In the following outburst of rage, he picks up his [[GunsAkimbo two handguns]] - which he knows are worthless against vampires - and goes gun blazing on the porch of his house. When he runs out of ammo and is swarmed, he has a last-second change of mind and crawls his way back inside the house. Not because he wants to live or is afraid of dying, but ''out of spite'']].
* DrowningMySorrows: Initially, Neville is one step away from outright alcoholism as a way to cope with his situation. He recalls how he spent first few days after his wife died (and he already lost his daughter few days prior) in alcohol-induced coma, only waking up to get hammered again. He probably did that again after [[spoiler:he had to stake Virginia and bury her ''again'']].
* {{Flashback}}s: This time showing how his wife succumbed to the infection, and forced to drive to a government bonfire to burn his dead daughter. [[spoiler:And then when Virginia came back to him as a vampire]].
* GenreSavvy: ZigZagged. Neville knows and tests ''some'' of the folk remedies against vampires. But it still took him few months to realise [[spoiler:it's easier and more efficient to just drag comatose vampires out into open for sun to kill them]]. He face-palms himself upon figuring this out.
* GhostCity: Los Angeles has a human population of one.
* GoodAllAlong: [[spoiler:The partial vampires, that Neville didn't even know existed to begin with.]]
* GreyAndGrayMorality: [[spoiler:Neville argues that the vampire society enjoyed killing the dead vampires. Ruth, however, argues that Neville also enjoyed killing. Ruth rationalizes the brutality as an inevitable part of a new civilization.]]
* GunsAkimbo: Deconstructed. In one of his {{Sanity Slippage}}s, Neville picks up his two pistols and goes gun blazing on his own porch. [[spoiler:He is almost instantly swarmed, even before running out of bullets, and barely makes it alive back inside]].
* GunsAreWorthless: Bullets only make entry holes, quickly "glued back" by the fluid the vampires are full of, making small caliber rounds utterly useless in harming them.
* HeelRealisation: A rather poignant one [[spoiler:in the ending, as Neville realizes, with horror, why the people who came after him are about to execute them - he was killing vampires who were beginning to stave off the worst urges, and thus terrified the survivors - and civilization's last hope.]]
* HeWhoFightsMonsters: [[spoiler:Neville eventually discovers that some of the infected people have discovered a means of suppressing more dangerous effects of the vampire bacteria, and that many of the vampires he's been killing during his daytime hunts were innocent people. He's pretty much ''their'' monster of legend, thus the title.]]
* HumansAreCthulhu: [[spoiler:How the partial vampires view Neville. In their eyes, he's an unstoppable monster from the old world slaughtering dozens of innocents during the days for seemingly no reason at all, and through his deeds, he becomes a monster of legends the same way vampires were for the humans, hence the title.]]
* TheImmune: Neville's immune to the plague.
* ImmuneToBullets: The dead vampires (ones not infected while alive) have this, due to their wounds healing instantaneously, whereas stakes (and other impalings) keep the wound open.
* LastOfHisKind: Neville is apparently the last uninfected human in the world, due to being TheImmune.
* NeonSignHideout: Played for drama for a change. Every vampire in LA knows where the last normal human in the city lives, so each dusk the vampires start flocking around Neville's house.
* OhCrap: Never in history of horror literature more has been achieved by four simple words, right [[CliffHanger when a chapter ends]].
-->[[spoiler:The watch had stopped]].
* OminousLatinChanting: Ominous classical music more like. Look up the full names to the music Neville plays to keep his mind off the vampires; ''Scönberg Transfigured Night, The Year of the Plague, Bernstein Symphony No. 2 (The Age of Anxiety), Schubert Symphony No. 4 (Tragic)...'' Emphasis on ominous, as he uses the music to drown out the hell the vampires break loose outside his house every night.
* TheOnlyOneAllowedToDefeatYou: Neville seems to adopt this stance towards his vampirised neighbor, even if there isn't anyone else out there to defeat him. [[spoiler:When the partial vampires get to him first, Neville naturally doesn't take it very well]].
* OurVampiresAreDifferent: It's stated the vampires are dumb. Not zombie-dumb, but still idiots, running on instinct alone. Ben Cortman is an exception to this, and Neville latches on to finding out why to keep him sane. He finds:
** Almost all of the traditional wards against vampires are apparently psychological. Garlic may or may not be a sort of anti-placebo effect, though Neville notices vampires coughing and choking whenever they're hit with garlic powder. Neville further hypothesizes things like the cross and mirror to be a result of extreme self-loathing. The cross has no effect on his Jewish neighbor, but as soon as he gets out the Star of David and a Torah, Ben begins panicking and doing everything he can to get away from the symbols.
** The vampires may be believing their own pop culture. Neville witnesses one vampire leap off from a street light and hypothesizes he was trying to turn into a bat.
** Vampirism is caused by a bacteria. There are two distinct variations: those who were infected while still alive, and infected who have reanimated from the bacteria. Living vampires are vulnerable to everything a human is vulnerable to, but dead vampires' lack of a heartbeat causes a vacuum that seals off any wound that isn't large (such as small arms fire). Hence why stakes are so effective: they force the wound open and bypasses the vampire's regeneration.
** Dead vampires crumble into dust when staked or otherwise killed. Neville remembers talking to a black gravekeeper who talked about vacuum-preserved corpses - any introduction of air would cause the corpses to crumble into dust. (The author may have been speculating about methods of preservation that were not yet in practice here.)
* ProductPlacement:
** Willy's Jeep station wagon is Neville's vehicle of choice. [[spoiler:It [[DestroyTheProductPlacement gets smashed]] later, after which he replaces it with exact same model]]. Ironically, the car was discontinued from production in 1965, while the book opens in [[TwentyMinutesIntoTheFuture 1976]].
** Sears is the main source of tools for Neville - he even loots a lathe from it. [[spoiler:The lathe gets wrecked along with the wagon]].
* RidiculouslyCuteCritter: The mongrel little dog Neville found and tried to tame.
* SanitySlippage: Neville gets dangerously close to tossing himself to the vampires several times.
* TheSiege: Neville's house is besieged by endless hordes of vampires. [[PunctuatedForEmphasis Every. Single. Night.]]
* StakingTheLovedOne: [[spoiler:In the book, Neville has to do this to his wife after she had already died from the plague and he buried her body because he couldn't bear to burn her like he had to do to his daughter. She then comes back as a vampire trying to kill him and he has to kill her all over again, this time presumably by staking]]
* SurvivorGuilt: To the point of suffering several [[HeroicBSOD breakdowns.]]
* TalkingToThemself: Obviously, since Robert is apparently the last human alive and has nobody else to talk with. The constant, deadpan monologues are in fact the main source of humor in the book.
* ThereIsAnother: [[spoiler:Subverted. When Ruth comes along, it appears that Neville might not be the only unaffected person still alive...And then it turns out that Ruth is TheMole for the partial vampires sent to spy on his defenses. Any and all survivors succumbed to the disease, and only stave it off by way of medicine.]]
* TitleDrop: At the very end, no less. The meaning of the title is also intensely creepy; see HeWhoFightsMonsters above for details.
* TookALevelInBadass: After a modest TimeSkip, Neville goes from being a normal guy who happens to be immune to the vampire bacteria and copes with alcohol to a muscled vampire-slaying [[BadassBeard beard-toting]] badass. in that time he's killed numerous [[spoiler:partial]] vampires and figured out their weaknesses and origin. Though his social skills have gone out the window from so many years of not talking to anyone. He also starts going Jack Bauer on his neighbor, what with the chair and the Torah.
* UnbuiltTrope: Not only is it the UrExample of the zombie apocalypse, but it also deconstructs the notion of the last human survivors. In this world, the monsters have become the norm, and the last human is simply a relic of the past.
* VampireHunter: Robert Neville hunts vampires during the day by staking them when they sleep.
* VanHelsingHateCrimes: [[spoiler:Turns out Neville has been killing partially-infected vampires alongside fully-infected ones, and is hunted down and executed for this.]] Oops.
* TheVirus: Well, a bacterial infection, but other than that, the trope is played straight.
* WorkingClassHero: Unlike all the adaptations, where Neville was made into a doctor and even an officer, in the book he's but a factory worker. It's made into a plot point with all the pain, time and effort it takes from him to educate himself and gain proper lab practice to even operate microscope efficiently.
* YankTheDogsChain: When he comes across an apparently unaffected dog out in the sun, Neville practically gets taken over with CutenessProximity as he plans to win over the thing and keep it as a pet. [[spoiler:It doesn't end well.]]
* ZombieApocalypse: Pretty much the UrExample, despite being written fourteen years before [[Film/NightOfTheLivingDead1968 the modern pop culture zombie]] was introduced.
** It's been said that Creator/GeorgeARomero got his idea for ''Film/NightOfTheLivingDead1968'' after reading the book.

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