Tammy Nelson, PhD, is a world-renowned expert in relationships, a psychotherapist in private practice, and the author of The New Monogamy. In addition, Nelson is a popular lecturer around the world on sexuality and human relationships and global relational change. She is a board-certified sexologist, an AASECT-certified sex therapist, a licensed professional counselor, and a certified Imago relationship therapist. She resides in the New York City area, where she works in her private practice treating couples who are looking to restore passion to their relationships, recover from infidelity, and create their new monogamy, one agreement at a time.