The Screwtape Letters

The story takes the form of a series of letters from a senior demon, Screwtape, to his nephew, a junior "tempter" named Wormwood, so as to advise him on methods of securing the damnation of a British man, known only as "the Patient".

Screwtape holds an administrative post in the bureaucracy ("Lowerarchy") of Hell, and acts as a mentor to Wormwood, the inexperienced tempter. In the body of the thirty-one letters which make up the book, Screwtape gives Wormwood detailed advice on various methods of undermining faith and promoting sin in the Patient, interspersed with observations on human nature and Christian doctrine. Wormwood and Screwtape live in a peculiarly morally reversed world, where individual benefit and greed are seen as the greatest good, and neither demon is capable of comprehending or acknowledging true human virtue when he sees it.