This is a new release of the original 1925 edition.

Books about Key Truths of Occult Philosophy

Provides brief introductions to more than one thousand religious movements that fall outside the American mainstream, with lengthier treatment of those that are controversial or have received media attention.

Books about Hartmann's Who's who in Occult, Psychic and Spiritual Realms...in the United States and Foreign Countries

"Compact, clearly printed, and a delight to use. A sine qua non for the reference collections of public, academic, and theological libraries". -- American Reference Books Annual