What is the title of C.S. Lewis’s 1942 Christian fantasy told through letters from a senior demon?

C.S. Lewis’s 1942 Christian fantasy told through letters from a senior demon is The Screwtape Letters. The fictional correspondence presents advice from Screwtape, an experienced tempter, to his junior associate Wormwood.

Lewis uses the reversed viewpoint to examine temptation, distraction, pride, resentment, and self-deception. Because the letters come from demons, readers must infer the moral guidance by recognizing that the demons’ goals are corrupt. The book is satirical rather than a handbook of occult practice.

The work first appeared in installments in the Anglican newspaper The Guardian. Its wartime publication helped connect Lewis’s imaginative method with his growing reputation as a Christian broadcaster and writer.

The title character, Screwtape, is not the human protagonist. Wormwood is the junior tempter assigned to a human “patient,” while Screwtape writes as his senior adviser. That structure gives the book its distinctive comic and paradoxical voice.