Prime. Adventures and advice on sex, love, and the sensual years. Collins, New York 2007, ISBN 978-0-06-117358-5.
Finding your perfect match. Perigee Book, New York 2006, ISBN 0-399-53244-7.
The lifetime love and sex quiz book. Hyperion, New York 2002, ISBN 0-7868-8748-6.
Everything you know about love and sex is wrong. Twenty-five relationship myths redefined to achieve happiness and fulfillment in your intimate life. Putnam, New York 2000, ISBN 0-399-14655-5.
Mit Dominic Cappello: Ten talks parents must have with their children about sex and character. Hyperion, New York 2000, ISBN 0-7868-8548-3.
Mit Virginia Rutter: The gender of sexuality. Pine Forge Press, Thousand Oaks 1998, ISBN 0-8039-9042-1.
Peer marriage. How love between equals really works. Maxwell Macmillan International, New York 1994, ISBN 0-02-931715-0.
Research on Relationships, in: Bennett M. Berger (Hrsg.): Authors of their own lives : intellectual autobiographies by twenty American sociologists, Berkeley : University of California Press, 1990, S. 363–380