Tracy Marks, M.A., is a licensed mental health counselor, astrologer, writer, instructor, and nature photographer. Her transformational astrology books, drawing upon her in-depth psychodynamic understanding include Astrology of Self-Discovery, The Art of Chart Interpretation, and Your Secret Self: Illuminating the The Twelfth House, have been translated into nine languages, and have sold over 150,000 copies. A psychotherapist since 1985, she currently maintains both counseling and astrology practices in Arlington, Massachusetts, and also teaches personal growth, literature and computer graphics courses in continuing education programs.