Which C.S. Lewis book is narrated by a demon advising his nephew?

The Screwtape Letters is narrated through advice from a senior demon to his nephew.

C.S. Lewis published The Screwtape Letters in book form in 1942. The work consists of letters from Screwtape, an experienced tempter, to his inexperienced nephew Wormwood. Wormwood has been assigned to influence a human known only as “the Patient.”

Lewis uses the inverted perspective to examine temptation, pride, distraction, resentment, and self-deception. The demons’ goals are presented as wrong, so readers must interpret their advice ironically. The book is not a conventional story with a single continuous plot; its structure is a series of connected letters.

The letters first appeared in the Anglican newspaper The Guardian, which published them weekly in 1941. Lewis dedicated the book to J.R.R. Tolkien, though their friendship later became strained over the work’s satirical treatment of demonic bureaucracy. The book remains one of Lewis’s most widely read works of Christian apologetics.