Sandra Summerfield Kozak, MS, is an internationally celebrated teacher and teacher-trainer who has studied and taught psychology, philosophy, and yoga practice for more than thirty years. She has developed presented accredited university yoga curriculums, nationally televised programs, internationally recognized teacher-training programs, and a variety of seminars and workshops. She teaches monthly workshops throughout America and is regularly invited to teach in Scotland, England, and continental Europe. She received her master’s degree from the University of Nevada in health ecology with a minor in psychology. The author of numerous articles, she is the co-author of Yoga for Your Type: An Ayurvedic Approach to Your Asana Practice with David Frawley. She lives near San Francisco where she sails, writes, and sees students in private practice. Kozak is the founder and director of International Yoga 124 Studies, an internationally affirmed yoga teacher certification program, and the president of Light Transitions, which produces the popular Breath Sounds breathing and relaxation tapes. She is an advisory board member of both the Yoga Research Center and Yoga International magazine, for which she has been a columnist. She has also served as vice president for both Unity in Yoga and the World Yoga Union.