In the past Graddon has written on SS officer Otto Rahn, Jack the Ripper, Pythagorus of Samos and the mythical land of Magonia. Now Graddon gives an esoteric journey across the ancient world in the guise of "Teachings from the Flying A." He begins with a number of chapters on ancient mysteries and secret societies: The Druids; The Rites of Mithras; The Gnostics; The Mysteries of Serapis; Odin; The Eleusinian Mysteries; Orpheus; Bacchus/Dionysus; Tammuz and Ishtar/Dimuzid and Inanna; Hermes Trismegistus; The Pyramid Mysteries; Isis; The Rose Cross; Morrigan: Goddess of Fallen Warriors. He gives us a number of chapters on sacred measure and divine number: Ancient Metrology; Ancient Measures; Ancient Geodesy; Gematria; The Numbers of Stonehenge; Pythagorean Number; Qabalah; Qabalah, the Golem and A.I.; Glastonbury: the Temple of Britain; The Tarot. He finishes with a third section that contains: The Secrets of the Holy Shroud; Initiation; The Great Pyramid's Golden Tip; The Sepher Yetzirah; more. The book is populated throughout by scores of illustrations and images.