Karen Hamaker-Zondag, Drs. (comparable to M.A.) Social Geography, University of Amsterdam; and Drs. Planologie University of Amsterdam. She lives and works in Holland, and has lectured and taught extensively in over 18 countries, including Japan, Russia, Croatia, Australia and the USA. She has been a professional astrologer for 20 years and teaches a four-year course in professional astrology and a three year course in Jungian psychology. She is the editor of the Dutch astrological journal Symbolon, and is the author of over twelve books on astrology and numerous articles.