Informative, both culturally and historically speaking, this work comes highly recommended for those engaged in researching the occult arts or occultist groups. Adler has done an outstanding job in presenting the diverse range of groups under discussion. The way he presents the information makes it easily understandable for someone like me, who had little prior knowledge about them. It is also beneficial for those who are confused by the commonly passed-down American religiocentrism regarding the occult arts and are seeking to clarify information from a reputable source. Although it is a long read, it is truly worth the effort. The detailed exploration of these groups provides valuable insights into their beliefs, practices, and historical contexts. It helps to demystify the often misunderstood world of the occult and offers a more comprehensive understanding for the reader.