Slaughterhouse-Five is a science fiction novel written by Kurt Vonnegut. It follows the story of Billy Pilgrim, a World War II soldier who becomes unstuck in time and experiences his life in a non-linear fashion. The book explores the horrors of war, the concept of free will, and the nature of time itself. Vonnegut's unique blend of science fiction and dark humor makes Slaughterhouse-Five a must-read for fans of the genre.