11/22/63 is a novel by American author Stephen King about a time traveler who attempts to prevent the assassination of United States President John F. Kennedy, which occurred on November 22, 1963. It is the 60th book published by Stephen King, his 49th novel and the 42nd under his own name. The novel required considerable research to accurately portray the late 1950s and early 1960s. King commented on the amount of research it required, saying "I've never tried to write anything like this before. It was really strange at first, like breaking in a new pair of shoes."

Stephen Edwin King is an American author. Called the "King of Horror", he has also explored other genres, among them suspense, crime, science-fiction, fantasy and mystery. He has also written approximately 200 short stories, most of which have been published in collections. His debut, Carrie (1974), established him in horror. Different Seasons (1982), a collection of four novellas, was his first major departure from the genre. Among the films adapted from King's fiction are Carrie, Christine, The Shining, The Dead Zone, Stand by Me, Misery, Dolores Claiborne, The Shawshank Redemption, The Green Mile and It. He has published under the pseudonym Richard Bachman and has co-written works with other authors, notably his friend Peter Straub and sons Joe Hill and Owen King. He has also written nonfiction, notably On Writing: A Memoir of the Craft.