Oakley Maxwell Hall (born July 1, 1920) is an American novelist. He was born in San Diego, California, graduated from the University of California, Berkeley, and served in the Marines during World War II. Some of his mysteries were published under the pen names "O.M. Hall" and "Jason Manor." His books focus primarily on the historical American West. His most famous book, Warlock, was a finalist for the Pulitzer Prize for Fiction in 1958. The film adaptation of the same title was directed by Edward Dmytryk. In Thomas Pynchon's introduction to Richard Fariña's Been Down So Long It Looks Like Up To Me, Pynchon stated that he and Fariña started a "micro-cult" around Warlock. Another novel, The Downhill Racers was made into a film starring Robert Redford in 1969. After the death of Wallace Stegner, Hall was considered the dean of West Coast writers, having supported the early careers of California noveli