Supposedly a fictional grimoire that appears in the stories written by Robert Bloch. Originally entitled Mysteries of the Worm, it was later referred to instead by its Latin equivalent upon H. P. Lovecraft’s suggestion. Lovecraft called De Vermis Mysteriis one of the books that “repeat the most hellish secrets learnt by early man”.
This ebook is an English translation of a Russian document authored by Roman Tertius Sibellius. You can download this from the Grimoires section.