Librarian note: There is more than one author in the GoodReads database with this name David Hoffmann is a member of Britain’s National Institute of Medical Herbalists. He has taught phytotherapy throughout the English-speaking world through his course, Therapeutic Herbalism. His numerous books nave been translated into at least eight languages and are basic references for both beginning and advanced students. David Hoffmann has been a clinical phytotherapist since 1978 and has been teaching Herbal Medicine since 1985. He is one of the founding members and a past president of the American Herbalists Guild. He is on the advisory board of the American Botanical Council, the peer-review boards of Herbalgram and the Protocol Journal of Botanical Medicine, and the steering committee of the American Herbal Pharmacopoea. He is the author of 17 books, and teaches phytotherapy throughout the world, including places such as Australia, New Zealand and Canada. He is visiting faculty at Bastyr University, The California Institute of Integral Studies, the National College of Phytotherapy, and the Rocky Mountain School of Botanical Studies. He resides in California.