DeKorne is a "psychonaut" exploring the "imaginal realms" through personal experomentaion and scholarly research. He guides the reader through the history and lore of psychotropic pllants, with advice on how to handle the eerie "Entities" one encounters in "hyperspace". A master gardener, DeKorne explains in loving detail how to cultivate many of these plants and how to extract their powerful psychoactive alkaloids. He provides down-to-earth information on dosages, typical reactions, length and intensity of experience, dangerous combinations, traditional and ritual uses, and much more. Although this book is about the use of psychoactive plants to access non-ordinary states of consciousness, it would be a mistake to attempt such a study without first examining some psychological and philosophical implications emerging from their known effects. The Shamanic cultures using Psychotropic plants have near-universal belief systems about them and about the realms of consciousness which they disclose. One of the major themes of this book concerns the postulate that transcendent dimensions and the entities inhabiting them are real, and that much of the challenge of using psychedelics profitably lies in learning how to integrate such insights into our world-view. The entity phenomenon challenges our will and capacity to take the next step in the evolution of consciousness at a time when the survival of our species is threatened. Reason suggests that many of the answers to our space/time dilemma lie in an analysis of the techniques of shamanism to provide guiding structures for these vital new explorations.