William Neal Harrison (October 29, 1933 – October 22, 2013) was an American novelist, short story writer, and screenwriter. Three films were based on two of his works: The short story "Roller Ball Murder" was turned into a screenplay for the 1975 film Rollerball, with a remake in 2002.The novel Burton and Speke was turned into the 1990 film Mountains of the Moon.