Which C.S. Lewis book presents Christianity through fictional correspondence from a senior tempter?

The Screwtape Letters presents Christianity through fictional correspondence from a senior tempter.

C.S. Lewis published The Screwtape Letters in book form in 1942. It consists of letters from Screwtape, an experienced demon, to his inexperienced nephew Wormwood. Screwtape gives advice about tempting a human patient, but his instructions expose the habits and self-deceptions that Lewis believed could damage a person’s spiritual life.

The letters use an inverted viewpoint: readers see Christian ideas discussed by demons rather than by an obvious religious narrator. This satirical structure lets Lewis examine distraction, pride, resentment, social pressure, and false humility. The book became one of his most widely read works.

The title is sometimes confused with Mere Christianity, which grew from radio talks and presents a direct explanation of shared Christian beliefs. The Screwtape Letters is instead an imaginative work of satire. Its sequel-like final piece, “Screwtape Proposes a Toast,” was published separately in 1959.