Which C.S. Lewis book presents a fictional correspondence between a demon and his nephew?

The Screwtape Letters presents fictional correspondence between the senior demon Screwtape and his nephew Wormwood.

C.S. Lewis’s book was published in 1942. Each chapter takes the form of a letter from Screwtape, an experienced tempter, advising Wormwood about the spiritual manipulation of a human being known as the Patient.

The letters use an intentionally reversed perspective. Instead of giving direct advice about virtue, Lewis describes temptation, distraction, pride, resentment, and self-deception from the imagined viewpoint of Hell’s bureaucracy. The satire allows the book to criticize ordinary moral habits without presenting itself as a conventional sermon.

Lewis wrote the work during the Second World War, and its original publication was connected with the Anglican newspaper The Guardian. Readers sometimes confuse its epistolary form with a collection of ordinary theological essays, but its fictional demons and comic inversion are essential to its design.