Karen Hamaker-Zondag started her astrological practice in 1975. She is a founding member of two schools in Holland: an astrological school, Stichting Achernar, founded in 1980, and a school of Jungian psychology, Stichting Orderir, founded 1987.
A leading astrologer in Holland, she also lectures extensively throughout the world and first began lecturing for the CPA (Centre for Psychological Astrology) in 1997.
She is the author of many astrological books including Foundations of Personality, Psychological Astrology, The Yod Book and The House Connection.
