George Powers Cockcroft (November 15, 1932 – November 6, 2020), widely known by the pen name Luke Rhinehart, was an American novelist, screenwriter, and nonfiction writer. He was born in Albany, New York. Rhinehart was known for his writing works "The Dice Man" (1971), "Adventures of Wim" (1986) and "The Search for the Dice Man" (1993).