John Dunning (b. 1942) is an American author of mysteries. Born in Brooklyn, he moved to Charleston, South Carolina, with his family in 1945. After failing to graduate from high school, Dunning held a series of odd jobs, first in Charleston and then in Denver, including work at a glass shop and at various racetracks, before taking a position as a copy boy with the "Denver Post". He published his first mystery novel, "The Holland Suggestions", in 1975, and went on to write several more books, including "Denver" (1980) and "Deadline" (1981). After a dispute with his publisher, Dunning quit writing to open a secondhand bookstore, Old Algonquin Books. He returned to the mystery field with "Booked to Die" (1992), which introduced the bibliophile homicide detective Cliff Janeway, who would go on to star in four more novels. Dunning is also an expert on old-time radio, and has published several reference works on the subject.