What is the title of C.S. Lewis’s 1942 book of Christian apologetics written as letters from a senior demon?

C.S. Lewis’s 1942 book of Christian apologetics written as letters from a senior demon is The Screwtape Letters. The fictional letters come from Screwtape, an experienced tempter, to his inexperienced nephew Wormwood, who is assigned to influence a human being known as the Patient.

Lewis uses the demonic viewpoint to discuss temptation, pride, distraction, fear, spiritual habits, and the misuse of ordinary pleasures. The technique reverses the usual perspective of religious writing: readers infer Christian principles by observing the demons’ plans and mistakes rather than receiving direct sermons from a narrator.

The book was first published in Britain in 1942 and later became one of Lewis’s most widely read works. It is distinct from Mere Christianity, which developed from wartime radio broadcasts, and from The Great Divorce, an imaginative account of heaven and hell published in 1945.