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“. . . this superb academic reference is the first comprehensive work devoted to psychoactive plants. Ratsch, an anthropologist, ethnopharmacologist, . . . includes more than 400 traditional and modern substances that ‘affect the mind or alter the state of consciousness’. . . .Each major monograph contains the plant’s scientific and common names, chemical structure, history, distribution, cultivation, appearance, preparation and dosage, ritual and medicinal uses, commercial forms and regulations, and effects, as well as research literature references. . . .This book offers something for everyone. . . . Highly recommended.” (Andy Wickens, Library Journal, August 2005)
“Rätsch’s Encyclopedia is massive in scope, exhaustively researched, heavily referenced, user-friendly, authoritative, and beautifully illustrated. It belongs on the bookshelf of everyone with an interest in psychoactive plants--from those with only a casual interest to veteran researchers.” (Rick Strassman, M.D., University of New Mexico School of Medicine, and author of DMT: The Spirit Mol)
“It is a truism in anthropology that virtually all cultures utilize plants and mushrooms for their psychoactive effects. The impulse to achieve altered states of consciousness is universal. Several previous books on psychoactive plants have become classics on this subject. While valuable historic additions to the library, they must now move over. This encyclopedia is truly destined to be the most authoritative reference on natural psychoactive substances for years to come.” (Mark Blumenthal, founder and executive director of the American Botanical Council, and editor of Her)
“In the realm of psychoactive plants, Christian Rätsch is the world’s most knowledgeable person. Here is his magnum opus--a veritable treasure trove of information about the most fascinating members of the plant kingdom. As the “teachers” and the gatekeepers to the spirit world, psychoactives help us cleanse the lenses of perception. No one interested in natural ways to expand consciousness should be without this magnificent volume.” (Ralph Metzner, PH.D., psychologist, author of Green Psychology, and coauthor of The Psychedelic Expe)
“Christian Rätsch’s remarkable Encyclopedia of Psychoactive Plants is an essential and comprehensive work that explores not only the expanse of plants that affect human consciousness but the genetic necessity for humanity to experience wide-ranging flexibility in consciousness. The plant world is basic to us, the foundation of our food, clothing, and shelter. But Christian’s book reminds us that human/plant interactions reach much deeper than these three needs; plant intelligence reaches deep within us and teaches us to see, hear, and understand the deep meanings in the world, meanings that we need, and are meant, to encounter in order to remain human.” (Stephen Harrod Buhner, author of The Secret Teachings of Plants and The Lost Language of Plants)
". . . the granddaddy of all drug books." (Charles Hayes, High Times, Nov 2005)
"A premier work, and important to have and refer to if you have any relationship to the world of psychoactive plants." (Mark Stavish, Institute for Hermetic Studies, April 2006)
"This encyclopedia is a large and somewhat intimidating book, but the format is friendly and embellished by many beautiful photographs and drawings. . . . this is a major work that will be an essential reference to those interested in cultural and historical aspects of psychedelics." (Herbalgram, No. 79, Aug - Oct 2008)
“This book covers pretty much every psychedelic/psychoactive plant out there, including several that people may not realize have psychoactive properties...For anyone interested in learning more about psychoactive plants this book will likely answer all your questions and more. It's a great complement to other books on the subject as well as a stand-alone book for your education on this expansive and important topic.” (Entheoradio, August 2013)
Christian Rätsch, Ph.D., is a world-renowned anthropologist and ethnopharmacologist who specializes in the shamanic uses of plants. He is the author of Marijuana Medicine and coauthor of Plants of the Gods, Shamanism and Tantra in the Himalayas, Witchcraft Medicine, and The Encyclopedia of Psychoactive Plants. He lives in Hamburg, Germany, and lectures around the world.
Albert Hofmann (1906-2008), the father of LSD, was a world-renowned scientist, member of the Nobel Prize Committee, Fellow of the World Academy of Sciences, and member of the International Society of Plant Research and of the American Society of Pharmacognosy. He was a leader in pharmaceutical-chemical research and the author of several books, including LSD: My Problem Child.