Who is the title demon in C.S. Lewis's The Screwtape Letters?

The title demon in C.S. Lewis's The Screwtape Letters is Screwtape. He is an experienced tempter who writes advice to his nephew Wormwood about influencing a human patient.

Lewis presents the book as a series of letters from Hell rather than as a conventional narrative. This reversed viewpoint lets him satirize temptation, self-deception, pride, distraction, and bureaucratic thinking.

The Screwtape Letters first appeared in book form in 1942. Lewis dedicated the work to J.R.R. Tolkien, his friend and fellow member of the literary group known as the Inklings, although the two writers had different religious and literary styles.

Wormwood is an important character, but he is not the title figure. He is Screwtape's inexperienced nephew and correspondent. The letters therefore have both a mentor-and-student structure and a deliberately ironic moral perspective.