Occult Books - This complete and unabridged edition of Thrice Greatest Hermes, containing translations of extant sermons and fragments of Trismegistic (Hermetic) literature, with Prolegomena, commentaries, and notes, will be of great value to anyone studying Hellenistic theosophy or the historic, mythic, and mystic origins of Christianity. It was first published in three volumes in London in 1906 and is considered the definitive masterpiece of G. R. S. Mead, Gnosticism's greatest scholar. Hardcover, 864 pages.