John Preston, Psy.D is professor emeritus with Alliant International University in Sacramento, CA and formerly with the University of California, Davis School of Medicine and the Professional School of Psychology, San Francisco. He is the author of 21 books covering topics such as: psychopharmacology, neurobiology, psychotherapy, spirituality and emotional healing. His books have been translated into 14 foreign languages. He is the author of "Drugs in Psychiatry" chapter in the "Encyclopedia Americana". Dr. Preston has presented over 500 invited talks during the past 25 years, speaking in the USA, Canada, Europe, Africa and Russia.-Amazon