Cultes des Goules, or Cults of Ghouls, is a fictional text created by Robert Bloch (August Derleth claimed to have invented the fictional text, but this was denied by both Lovecraft and Bloch himself). It is a book of black magic written by Francois-Honore Balfour (Comte d'Erlette) in 1702. It was published in France and later denounced by the church. Only a handful of copies are in existence. One of the known copies was kept for 91 years in an arcane library of the Church of Starry Wisdom in Providence, Rhode Island. After Robert Blake’s mysterious death in 1935, Doctor Dexter removed the grimoire and added it to his library.
Cultes des Goules is mentioned numerous times in the works of Caitlin R. Kiernan and plays an especially important role in her 2003 novel Low Red Moon. The text is also prominently mentioned in her short story "Spindleshanks (New Orleans, 1956)" — collected in To Charles Fort, With Love (2005).