Including Barrett's previously unpublished manuscript on Crystal Vision. From the editor of The Grimoire of Armadel and author of Sexuality, Magick and Perversion, this is the story of an enigmatic 18th century magus whose work still influences the current generation. Francis Barrett was the first since the middle ages to compile a manual or 'grimoire' of magick. His The Magus or Celestial Intelligencer is widely read and still capable of providing insight.