Tracy Marks, M.A., is a licensed mental health counselor, astrologer, writer, instructor, and nature photographer. Her transformational astrology books, including "The ""Astrology of Self-Discover"y and "The Art of Chart Interpretation", have been translated into nine languages and have sold over 150,000 copies. A psychotherapist since 1985, she is currently maintaining both counseling and astrology practices in Arlington, Massachusetts, as well as teaching in continuing education programs.