The Exorcist was made into the movie "The Exorcist III" in 1990. Like "The Exorcist", it involves demonic possession. The book was the focus of a court case over its exclusion from "The New York Times" Best Seller list. Blatty based aspects of the Gemini Killer on the real-life Zodiac Killer, who, in a January 1974 letter to the "San Francisco Chronicle", had praised the original "Exorcist" film as "the best satirical comedy that I have ever seen". The Exorcist is a 1973 American supernatural horror film directed by William Friedkin, adapted by William Peter Blatty from his 1971 novel of the
Exorcist II: The Heretic the Book of Job; it's God testing the good. In this sense, Regan (Linda Blair) is a modern-day saint — like Ingrid Bergman in "Europa '51", and in a way, like Charlie in "Mean Streets". I like the first "Exorcist", because of the Catholic guilt I have, and because it scared the hell out of me; but "The Heretic" surpasses it. Maybe Boorman failed to execute the material, but the movie still deserved better than it got." Author Bob McCabe's book "The Exorcist: Out of the Shadows" contains a chapter on the film in which Linda Blair said the movie