Nicholas Mosley was born in London on June 25, 1923 and was educated at Eton and Oxford. He served in Italy during World War II, and published his first novel, Spaces of the Dark, in 1951. His book Hopeful Monsters won the 1990 Whitbread Award.
Mosley is also the author of several works of nonfiction, most notably the autobiography Efforts at Truth and a biography of his father, Sir Oswald Mosley, entitled Rules of the Game/Beyond the Pale. He resides in London.