Which C.S. Lewis work presents demonic advice as letters from Screwtape to Wormwood?

The Screwtape Letters presents demonic advice as letters from Screwtape to Wormwood.

C.S. Lewis published The Screwtape Letters in book form in 1942. It consists of correspondence from a senior demon, Screwtape, to his inexperienced nephew Wormwood, who has been assigned to tempt a human being. By reversing the usual moral viewpoint, Lewis uses demonic advice to expose habits such as distraction, vanity, resentment, and self-deception.

The book began as a series of pieces connected with wartime broadcasting. Its epistolary format gives the work a distinctive voice: readers must understand that the advice is intentionally wrong, even though it often describes recognizable human behavior. Lewis’s preface also warns about the risks of trying to imagine the world from a diabolical perspective.

The title is sometimes confused with The Great Divorce, another Lewis work concerned with heaven, hell, and moral choice. The Great Divorce is an allegorical narrative, whereas The Screwtape Letters is structured as letters between demons.