Gene Brewer (born Eugene N. Brewer, 4 July 1937) is an American writer, the author of the K-PAX book series, about a man who claims to be a visiting extraterrestrial from a planet called K-PAX: K-PAX (1995), On a Beam of Light (2001), K-PAX III: The Worlds of Prot (2002), K-PAX IV (2007) and Prot's Report, a brief natural history of the Earth, which appears in K-PAX: The Trilogy, an omnibus edition of the first three K-PAX books. The first book in the series was made into a Universal Pictures film in 2001; it stars Kevin Spacey and Jeff Bridges.

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