"Good Omens" is a humorous take on the biblical Apocalypse, following an angel and a demon who have grown fond of Earth and its inhabitants, and are not too keen on the impending end of the world. As they try to locate the misplaced Antichrist and prevent the Four Horsemen from bringing about Armageddon, they encounter an array of quirky characters, including witch-hunters, modern-day witches, and the Four Horsemen themselves. The novel combines comedy, fantasy, and philosophical themes, offering a satirical critique of religious prophecy and human nature.

In this dark and imaginative fantasy, a young Londoner named Richard Mayhew finds his mundane life turned upside down when he stumbles upon a young woman named Door, bleeding on the sidewalk. After aiding her, he is thrust into the shadowy, parallel world of London Below, a realm of magic, danger, and intrigue that exists beneath the streets of London Above. As Richard journeys through this eerie underworld with a cast of bizarre and fantastical characters, he must confront malevolent forces and unravel a complex conspiracy to help Door discover why her family was murdered, all while trying to find a way back to his old life.

The book is the second installment in a historical fiction series that weaves together romance, science fiction, and adventure. It continues the story of a 20th-century Englishwoman who has time-traveled to 18th-century Scotland and fallen in love with a dashing Highland warrior. As the Jacobite rebellion leads to the fateful Battle of Culloden, the couple faces the threat of being torn apart by the tumultuous events of history. Interwoven with their past is the present-day narrative of their daughter, who discovers her parents' remarkable story and the truth of her own origins. The novel explores themes of love, loyalty, and the impact of the past on the present.