S. Dziemianowicz is an American author and editor who has written extensively on the horror, fantasy, and science fiction genres. He is the former editor of Weird Tales magazine, and has also written for the New York Times Book Review, Publishers Weekly, and other publications. He is the author of several books, including The Weird Tale: Arthur Machen, Algernon Blackwood, M.R. James, and Others (1990) and Supernatural Literature of the World: An Encyclopedia (2005).