Samuel Guy Endore (July 4, 1901 – February 12, 1970), born Samuel Goldstein and also known as Harry Relis, was an American novelist and screenwriter. During his career he produced a wide array of novels, screenplays, and pamphlets, both published and unpublished. A cult favorite of fans of horror, he is best known for his novel The Werewolf of Paris, which occupies a significant position in werewolf literature, much in the same way that Dracula does for fans of vampires.