"Good Omens" is a novel written by Neil Gaiman and Terry Pratchett, first published in 1990. The story follows an angel named Aziraphale and a demon named Crowley who team up to prevent the apocalypse. They discover that the Antichrist, a young boy named Adam, has been misplaced, leading to a series of comedic and chaotic events. Set in modern-day England, the narrative explores themes of good versus evil, friendship, and the absurdity of human nature. The book has been adapted into a successful television miniseries, further popularizing its unique blend of humor and fantasy.