Leonard Oswald Mosley (11 February 1913 – June 1992) was a British journalist, historian, biographer and novelist. His works include five novels and biographies of General George Marshall, Reichsmarschall Hermann Göring, Orde Wingate, Walt Disney, Charles Lindbergh, Du Pont family, Eleanor Dulles, Allen Welsh Dulles, John Foster Dulles and Darryl F. Zanuck. He also worked as chief war correspondent for London's The Sunday Times.