Which of the following films was not adapted from a novel by Richard Condon?

"Winter Kills", a 1979 satirical black comedy thriller film written and directed by William Richert, "Prizzi's Honor", a 1985 American black comedy crime film directed by John Huston, and "The Manchurian Candidate", a 1962 American neo-noir psychological political thriller film directed and produced by John Frankenheimer, are all films that were adapted from novels written by Richard Condon. "The Grifters" (1990) is a film that was not based on a novel by Condon.

"The Grifters" is an American neo-noir crime thriller film that was directed by Stephen Frears and produced by Martin Scorsese. It stars John Cusack, Anjelica Huston, and Annette Bening. The screenplay was written by Donald E. Westlake, based on Jim Thompson's 1963 novel "The Grifters". The film's storyline is about a small-time conman who has torn loyalties between his estranged mother and new girlfriend, both of whom are high-stakes grifters with their own angles to play.

This film won the Independent Spirit Award for Best Film and was declared one of the Top 10 films of 1990 by The National Board of Review of Motion Pictures.

Richard Condon (Richard Thomas Condon, March 1915, New York, NY – April 1996, Dallas, TX) was an American political novelist. Though his works were satirical, they were generally transformed into thrillers or semi-thrillers in other media, such as cinema.