Cultes des Goules appeared in 1703, and was said to be the work of François-Honoré Balfour (sometimes given as Francois Honoré-Balfour), the Comte d'Erlette. The book discussed a cult dedicated to necromancy and necrophagy that existed at the time in France. The rites and practices of the cult were described in detail, and included black magic and necrophilia. The members of this group were referred to as "goules". After publication, it was immediately denounced by the Church and state, though the author's aristocratic status protected him from prosecution. No evidence of the cult was ever found.
The Zimmerman Library currently holds three copies of this book, though significant differences between the texts have cast doubt on the authenticity of one (if not all) of the volumes in their possession.
from Emerald Hammer
Tome: Cultes Des Goules by Francois Honore-Balfour, the Comte d'Erlette 1703
Spell Mult: x2
Study Time: 22 Weeks
Spells: the Black Binding, Call/Dismiss Nyogtha, Call/Dismiss Shub-Niggurath, Contact Lesser Ghoul Ressurection, Shrivelling, Summon/bind Byakhee, Summon/Bind Dark Young of Shub Niggurath, Voorish sign.
[Call/Dismiss Mordiggian (optional spell)].
References: p84, Encyclopedia Cthulhiana 2nd ed., Daniel Harms, Chaosium 1998. pp25-26, The Realm of shadows, Pagan Publishing 1997.