When cabdriver Dave Rudman's wife of five years deserts him for another man, taking their only child with her, he is thrown into a tailspin of doubt and discontent. Fearing his son will never know his father, Dave pens a gripping text-part memoir, part deranged philosophical treatise, and part handbook of "the Knowledge" learned by all London cab drivers. Meant for the boy when he comes of age, the book captures the frustration and anxiety of modern life. Five hundred years later, the "Book of Dave "is discovered by the inhabitants on the island of Ham, where it becomes a sacred text of biblical proportion, and its author is revered as a mighty prophet.