Good Omens: The Nice and Accurate Prophecies of Agnes Nutter, Witch (1990) is a World Fantasy Award nominated novel written in collaboration between the English authors Terry Pratchett and Neil Gaiman.

The book is a comedy and a quasi-parody of the 1976 film The Omen (as well as other books and films of the genre), concerning the birth of the son of Satan, the coming of the End Times and the attempts of the angel Aziraphale and the demon Crowley to avert them, having become accustomed to their comfortable situations in the human world. A subplot features the gathering of the Four Horsemen of the Apocalypse—War, Famine, Pollution (Pestilence having retired in 1936 following the discovery of penicillin), and Death—the last of whom is characterised in a manner reminiscent of the personification of Death in Pratchett's Discworld novels and calls himself Azrael before his final exit.

It is the coming of the End Times: the Apocalypse is near, and Final Judgment will soon descend upon the human race. This comes as a bit of bad news to the angel Aziraphale (who was the angel of the Garden of Eden) and the demon Crowley (who, when he was originally named Crawly, was the serpent who tempted Eve to eat the apple), respectively the representatives of God and Satan on Earth, as they have become used to living their cozy, comfortable lives and have, in a perverse way, taken a liking to humanity. As such, since they are good friends (despite ostensibly representing the polar opposites of Good and Evil), they decide to work together and keep an eye on the Antichrist, destined to be the son of a prominent American diplomat stationed in Britain, and thus ensure he grows up in a way that means he can never decide between Good and Evil, thereby postponing the end of the world.

Neil Richard Gaiman ( /ˈɡeɪmən/; born 10 November 1960) is an English author of short fiction, novels, comic books, graphic novels, audio theatre and films. His notable works include the comic book series The Sandman and novels Stardust, American Gods, Coraline, and The Graveyard Book. He has won numerous awards, including Hugo, Nebula, Bram Stoker, Newbery Medal, and Carnegie Medal in Literature. He is the first author to win both the Newbery and the Carnegie medals for the same work.

Gaiman's family is of Polish and other Eastern European Jewish origins; his great-grandfather emigrated from Antwerp before 1914 and his grandfather eventually settled in the Hampshire city of Portsmouth and established a chain of grocery stores. His father, David Bernard Gaiman, worked in the same chain of stores; his mother, Sheila Gaiman (née Goldman), was a pharmacist. He has two younger sisters, Claire and Lizzy. After living for a period in the nearby town of Portchester, Hampshire, where Neil was born in 1960, the Gaimans moved in 1965 to the West Sussex town of East Grinstead where his parents studied Dianetics at the Scientology centre in the town; one of Gaiman's sisters works for the Church of Scientology in Los Angeles. His other sister, Lizzy Calcioli, has said, "Most of our social activities were involved with Scientology or our Jewish family. It would get very confusing when people would ask my religion as a kid. I’d say, 'I’m a Jewish Scientologist.'" Gaiman says that he is not a Scientologist, and that like Judaism, Scientology is his family's religion.

Sir Terence David John "Terry" Pratchett, OBE (born 28 April 1948) is an English novelist, known for his frequently comical work in the fantasy genre. He is best known for his popular and long-running Discworld series of comic fantasy novels. Pratchett's first novel, The Carpet People, was published in 1971, and since his first Discworld novel (The Colour of Magic) was published in 1983, he has written two books a year on average. His latest Discworld book, Snuff is the third-fastest-selling novel since records began in the United Kingdom selling 55,000 copies in the first three days.

Pratchett was the UK's best-selling author of the 1990s, and has sold over 70 million books worldwide in thirty-seven languages. He is currently the second most-read writer in the UK, and seventh most-read non-US author in the US.

Pratchett was appointed Officer of the Order of the British Empire (OBE) in 1998 and was knighted "for services to literature" in 2009. In addition, he was knighted in the 2009 New Year Honours. In 2001 he won the Carnegie Medal for his children's novel The Amazing Maurice and his Educated Rodents.