What is the title of C.S. Lewis’s 1942 novel about a senior demon’s advice?

C.S. Lewis’s 1942 novel about a senior demon’s advice is The Screwtape Letters.

The book is structured as a series of letters from Screwtape, an experienced demon, to his inexperienced nephew Wormwood. Screwtape offers advice on tempting a human subject, while Lewis uses the demonic viewpoint to satirize distraction, self-deception, pride, and misplaced priorities.

Lewis wrote the letters during the Second World War, and they were first published in book form in 1942. Their unusual method reverses the expected moral perspective: readers infer the virtues of patience, humility, faith, and charity from the demons’ hostile commentary.

The book is often confused with The Great Divorce, another Lewis work dealing with spiritual themes. The Great Divorce is a separate allegorical narrative published in 1945. The distinctive epistolary form and the characters Screwtape and Wormwood identify the 1942 book.