Harry Harrison is a science fiction writer. He is best known for his humorous SF, which includes The Stainless Steel Rat series, the Bill the Galactic Hero series, and the stand-alone novels The Technicolor Time Machine and Star Smashers of the Galaxy Rangers. He has also written serious SF, including Make Room! Make Room!, which inspired the film Soylent Green (although the film's most famous plot element was not in the book); the Deathworld trilogy; the To The Stars trilogy; and the West of Eden trilogy.