Throughout history, people have been intrigued with spirits, angels, or devas as sources of wisdom and guidance. They are not only interesting as those who possess an insight into events and circumstances, but also as proof of life after death. In this clear and useful reference guide, Bjorling presents a listing of the literature on the various ways in which people of different cultures have consulted spirits—through shamans and oracles, magic, mediums, Voodoo, and psychics. Each chapter contains a general introduction to the respective topic as well as a listing of pertinent books, articles, and dissertations. His survey also includes early spirit contacts in Africa, Latin America, and Asia.