Lovecraft circle SealDerleth Elder Sign SealExtended universe sigil Grimoires are books of great importance or power and are the source of much of the forbidden knowledge that illuminates the darkest recesses of the world. These books contain forbidden knowledge and discoveries about the Great Old Ones or of many occult topics. Often times these discoveries of forbidden truths end up driving the reader insane or leading to their ruin in one way or another.

Complete List of Known GrimoiresEdit


This trend was began by H. P. Lovecraft already before the creation of the Cthulhu Mythos. He also encouraged his colleagues (Clark Ashton Smith, Robert E. Howard and others) to utilize his grimoires in their stories and to invent their own. The appearance of references to these forbidden books in the works of many authors lead to readers believing they might be real. Some of the most well known grimoires in the mythos are the Necronomicon (or "Kitab Al-Azif"), Book of Eibon and Unaussprechlichen Kulten.


  1. Ramsey Campbell, "The Inhabitant of the Lake"
  2. Henry Kuttner, "Hydra"
  3. Richard F. Searight, ”The Sealed Casket”, ”The Warder of Knowledge
  4. H. P. Lovecraft & Duane Rimel, "The Tree on the Hill"
  5. Duane Rimel, "The Music of the Stars"
  6. Lin Carter's Xothic Legend Cycle
  7. Brian Lumley, "Cement Surroundings"
  8. Brian Lumley, "The Horror At Oakdeene"
  9. Brian Lumley, ”The Sorcerer's Dream
  10. Robert M. Price, "Lumley as Lovecraft"
  11. Robert M. Price, Ibid.
  12. Robert M. Price, Ibid.
  13. Robert M. Price, Ibid.
  14. Robert M. Price, Ibid.
  15. Robert M. Price, Ibid.
  16. Willis Conover (2002). Lovecraft at Last.
  17. Walter C. DeBill Jr., "The Changeling"
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