The Man Who Was Thursday: A Nightmare is a novel by G. K. Chesterton, first published in 1908. The book is sometimes referred to as a metaphysical thriller. In Edwardian era London, Gabriel Syme is recruited at Scotland Yard to a secret anti-anarchist police corps. Lucian Gregory, an anarchistic poet, lives in the suburb of Saffron Park. Syme meets him at a party and they debate the meaning of...