"Left Behind" is a series of Christian novels written by Tim LaHaye and Jerry B. Jenkins. The story follows a group of people who are left on Earth after the Rapture, an event where believers in Christ are taken to heaven. The series explores themes of faith, survival, and the struggle between good and evil during the end times. The first book, also titled "Left Behind," was published in 1995 and became a bestseller. It has since expanded into a larger series, including spin-off books, movies, and graphic novels, all focusing on the challenges faced by those who remain after the Rapture.