On the heels of his widely successful trilogy of works honouring H. P. Lovecraft, Donald Tyson now unveils a true grimoire of ritual magic inspired the Cthulhu Mythos. The Grimoire of the Necronomicon is a practical system of ritual magic based on Lovecraft's mythology of the alien gods known as the Old Ones. Fans of Lovecraft now have the opportunity to get in touch safely with the Old Ones and draw upon their power for spiritual and material advancement. Tyson expands upon their mythology and reintroduces these "monsters" in a new, magical context-explaining their true purpose for our planet. As a disciple, you choose one of the seven lords as a spiritual mentor, who will guide you toward personal transformation. Daily rituals provide an excellent system of esoteric training for individual practitioners. This grimoire also provides structure for an esoteric society - Order of the Old Ones - devoted to the group practice of this unique system of magic.