Breakfast in the Ruins: A Novel of Inhumanity is a 1972 novel by Michael Moorcock, which mixes historical and speculative fiction. It was first published in the United Kingdom by the New English Library. The novel centres on Karl Glogauer, who is also the protagonist of Moorcock's Nebula Award winning novella, Behold the Man, his homosexual exploits with an unnamed man from Nigeria, and his fantasies of the past and lives that he could have led.

Michael John Moorcock is an English–American writer, particularly of science fiction and fantasy, who has published a number of well-received literary novels as well as comic thrillers, graphic novels and non-fiction. He has worked as an editor and is also a successful musician. He is best known for his novels about the character Elric of Melniboné, which were a seminal influence on the field of fantasy in the 1960s and 1970s.