The Exorcist is a 1971 horror novel by American writer William Peter Blatty. The book details the demonic possession of eleven-year-old Regan MacNeil, the daughter of a famous actress, and the two priests who attempt to exorcise the demon. Inspired by a 1949 case of demonic possession and exorcism that Blatty heard about while he was a student at Georgetown University, the novel became a literary phenomenon upon its release, spending over a year on the New York Times bestseller list. Blatty's work explores profound themes of faith, doubt, and the nature of evil, blending visceral horror with theological inquiry. The novel's success spawned a major film adaptation and numerous sequels, cementing its place as a cornerstone of modern horror literature.
