I have, at a vast labor and expense, both of time and charges, collected whatsoever can be deemed valuable and rare, in regard to the subject of Hindu and Natural Magic, Indian Occultism-the Cabala-Celestial and Ceremonial Magic-Alchymy and Spiritism; and have divided it into two books ["Great Book of Magical Art, Hindu Magic and East Indian Occultism, and The Book of Secret Hindu, Ceremonial, and Talismanic Magic"]"-From the author's preface.