The Man Who Was Thursday: A Nightmare is a 1908 novel by G. K. Chesterton. The book has been described as a metaphysical thriller. Chesterton's 1908 nightmarish and suspenseful mystery The Man Who Was Thursday weathers the storm of time very well. Syme, recruited by the police to infiltrate an anarchist group whose members adopt the names of the week, goes on a madcap and confused chase where nothing and no one is what it seems. Lucian Gregory, an anarchist and a poet. He hopes to be elected as Thursday on the Central Anarchist Council but is disappointed. In the long run, he turns out to be the only intellectual anarchist.
