Which C.S. Lewis book features letters from a senior demon advising Wormwood?

The Screwtape Letters features letters from the senior demon Screwtape advising Wormwood.

C.S. Lewis’s book is presented as a collection of fictional letters written by Screwtape, an experienced tempter, to Wormwood, his inexperienced nephew. The correspondence reverses ordinary moral advice: the demons discuss how to encourage distraction, vanity, resentment, and spiritual neglect in a human “patient.”

The unusual format lets Lewis examine human behavior through satire. Instead of directly telling readers how to live, the book exposes the tactics that the demons hope will work. Lewis wrote it during the Second World War, and it first appeared in book form in 1942.

The work is often grouped with Lewis’s Christian apologetic writing, but it differs sharply in tone from Mere Christianity. It is fictional, comic, and deliberately ironic. Readers must remember that Screwtape’s statements are part of the demon narrator’s strategy, not straightforward instructions from Lewis.