The Bible includes a number of references to demons and exorcism. The New Testament describes occasions when Jesus Christ expelled evil spirits by prayer and the power of his command. In the Roman Catholic church, exorcism is an order that priests may practice with special permission. It is mainly used as a preparation for the sacrament of baptism.

When originally published in 1971, The Exorcist became not only a bestselling literary phenomenon, but one of the most frightening and controversial novels ever written. (When the author adapted his book to the screen two years later, it then became one of the most terrifying movies ever made.) Blatty fictionalized the true story of a child's demonic possession in the 1940s. The deceptively simple story focuses on Regan, the 11-year-old daughter of a movie actress residing in Washington, D.C.; the child apparently is possessed by an ancient demon. It's up to a small group of overwhelmed yet determined humans to somehow rescue Regan from this unspeakable fate. Purposefully raw and profane, this novel still has the extraordinary ability to literally shock us into forgetting that it is "just a story." The Exorcist remains a truly unforgettable reading experience. Blatty published a sequel, Legion, in 1983. --Stanley Wiater