Buenos Presagios (Good Omens) by Terry Pratchett and Neil Gaiman tells the complete story of a bungled apocalypse, focusing on an angel and demon who, having grown fond of Earth, team up to prevent the end of the world. When a mix-up results in the wrong child being raised as the Antichrist, the duo, along with others, attempts to find him in the village of Lower Tadfield. Ultimately, the child chooses humanity, stopping Armageddon, and the book stands as a complete narrative. You can find detailed summaries and analyses of this novel at Good Omens - Wikipedia or Audible.com .