John Michael Greer has published numerous books about occult traditions and the unexplained. As well as researching the immense scholarly literature on occult traditins and secret societies, Greer is a practicing occultist, Grand Archdruid of the Ancient Order of Druids in America (AODA) and 32nd degree Freemason. His recent works include Monsters: an Investigator's Guide to Magical Beings which has appeared in Spanish and Hungarian editions, and The New Encyclopedia of the Occult.