The Man Who Was Thursday

According to Wikipedia, "The book has been referred to as a metaphysical thriller... Although it deals with anarchists, the novel is not an exploration or rebuttal of anarchist thought; Chesterton's ad hoc construction of "Philosophical Anarchism" is distinguished from ordinary anarchism and is referred to several times not so much as a rebellion against government but as a rebellion against Good... Gilbert Keith Chesterton (29 May 1874 – 14 June 1936) was an English writer. His prolific and diverse output included philosophy, ontology, poetry, play writing, journalism, public lecturing and debating, literary and art criticism, biography, Christian apologetics, and fiction, including fantasy and detective fiction."