I Am Legend, science-fiction novel written by American author Richard Matheson, published in 1954.
In Los Angeles in 1976, Robert Neville is perhaps the last human alive. After the outbreak of a pandemic the year before, everyone else on the planet has been turned into a vampire. During the day, when the creatures are comatose, he seeks them out and kills them with a wooden stake or drags them out into killing sunlight, fixes the defences on his house, strings up garlic to deter would-be invaders, and clears dead vampires off the lawn.
At night, he barricades himself indoors and drinks himself into a stupor while the vampires taunt him and try to break in. But these are not mythological vampires such as Dracula; they include his neighbours and other people he knew, including a once-close friend. By conducting a variety of experiments, Neville learns that the condition has been caused by a bacterium to which he alone is immune. Further experiments explain all the “facts” about vampires involving fear of light and garlic, invisibility in mirrors, need for fresh blood, immunity to bullets, susceptibility to wooden stakes, and aversion to religious symbols. The true horror of the story does not lie in the fights with the vampires, but in what the life Neville is forced to lead does to him. For most of the novel he is totally alone, forced to commit barbaric slaughter on a daily basis just to survive, hanging on to a life that he does not really want to live any more.
Matheson’s calm writing style does nothing to lessen the chill or the impact of Neville’s pain as he describes the death of his wife and daughter. As Neville loses his grip on sanity and comes close to giving up, the reader comes to understand what one man can endure if he has to and what happens when he goes too far. The final twist in the tale brings about the realization that Neville, the last human, is now the monster of legend, the outlier in a world that fears him as much as he fears it.
Matheson’s novel, which he acknowledged was strongly influenced by Bram Stoker’s canonical vampire novel Dracula, has been adapted for the screen three times: the first in 1964 as The Last Man on Earth, starring Vincent Price as Neville, followed by The Omega Man (1971), with the Neville role played by Charlton Heston, and last a 2007 version starring Will Smith as Neville. The first version is most faithful to the book, which, in 2012, the Horror Writers Association honoured as the greatest vampire novel of the 20th century.