In this third and final book of The Magus, Francis Barrett turns from magical practice to magical history—presenting a rare and invaluable compendium of the great minds who shaped Western occult philosophy.

Book III offers concise biographical accounts of dozens of ancient, medieval, and Renaissance adepts, including Zoroaster, Hermes Trismegistus, Pythagoras, Paracelsus, Roger Bacon, Agrippa, and more. These are the sages, mystics, alchemists, astrologers, and magicians whose teachings laid the foundation for everything in The Magus.

Far more than a bibliography, this is a spiritual lineage—a transmission of ideas and inspiration across generations. By exploring the lives and writings of these visionaries, Barrett reveals the continuity of esoteric wisdom through the centuries and situates his own work within a long tradition of initiates and seekers.

Whether you're a student of occult history or a practitioner of the arts, Book III offers insight into the intellectual and spiritual giants upon whose shoulders modern magic stands. Their philosophies echo across time—and this volume preserves their legacy.