The Screwtape Letters

Author: C. S. Lewis
Published: 1942

Originally a series published in a newspaper, the letters are from one demon to his nephew. The uncle advises the younger demon on the best way to tempt a human to doubt the teachings of Christianity. This is one of the few books I put down without finishing (seems to happen more lately than in my youth). Within the velvet glove of the prose is an iron fist of Christian proselytizing. After a dozen chapters I had to throw in the towel.