Which 1942 C.S. Lewis book presents a fictional account of temptation from a demon’s viewpoint?

The Screwtape Letters presents a fictional account of temptation from a demon’s viewpoint. C.S. Lewis published the book in 1942.

The work consists of letters from Screwtape, an experienced demon, to his inexperienced nephew Wormwood. Screwtape advises Wormwood on how to tempt a human being, whom the letters call “the Patient,” away from Christian faith and moral attention.

Lewis uses inversion as the book’s central literary device. The demons describe virtues as threats and temptations as opportunities, allowing readers to recognize how pride, distraction, resentment, and self-deception can operate in ordinary life.

The book is sometimes described as a novel, but its epistolary structure makes it better understood as a series of connected fictional letters. It is also distinct from Mere Christianity, which developed from radio talks and presents Christian arguments in a direct, non-fictional voice.