Jules de Grandin is a fictional occult detective that, from 1925-1951, starred in 92 short stories and one novel by Seabury Quinn in the pulp magazine anthology series Weird Tales.

In the pages of Weird Tales, Quinn also authored a serialized novel featuring de Grandin entitled The Devil’s Bride, which deals with a young girl being kidnapped by satanists.

In 1966, Arkham House published a collection of 10 de Grandin stories as The Phantom Fighter, leading some fans to refer to the character by this nickname afterward.

Similar to Sherlock Holmes having a supporting cast of the landlady/housekeeper Mrs. Hudson and his aid and biographer Dr. Watson, de Grandin has a housekeeper named Nora McGinnis and is assisted on his investigations by Dr. Trowbridge, a fellow physician who narrates the stories.

In his stories, De Grandin sometimes encounters otherworldly beings such as ghosts and werewolves, but in several instances he discovers the danger at hand is not supernatural as others suspected but simply the evil acts of ordinary people who are corrupt.