Gerald R. Weeks, Ph.D., ABPP, CST is a Professor in the Program in Marriage and Family Therapy at the University of Nevada-Las Vegas. He is a licensed psychologist, Fellow, Approved-Supervisor, and Clinical Member of the American Association of Marriage and Family Therapy, and is a Diplomate and Senior Examiner of the American Board of Family Psychology of the American Board of Professional Psychology and a Diplomate of the American Board of Sexology. He is also a Certified Sex Therapist and Certified Supervisor of Sex Therapists of the American Association of Sex Educators, Counselors and Therapists. He has published a widely diverse spectrum of almost 25 advanced professional texts, including one or more "classic" texts in the fields of individual, sex, marital, and family therapy. His first book, Paradoxical Psychotherapy (with Lou L'Abate, 1982) became a national and international best-selling text and was reprinted in 7 languages. In spite of being a professional book which typically sell 3-5 thousand copies, the text sold over 100,000 copies and was one of the publishers best-sellers for over 5 years. Several of his books are widely used in marriage and family programs in the U.S. and abroad. His Couples in Treatment (with S.Fife, 2013) book is now in its 3rd edition. His co-authored and co-edited the text Systemic Sex Therapy which is now in the 2nd edition and is the senior author of the Clinician's Guide to Sex Therapy which is in press as a 2nd edition. He has also published dozens of scientific papers and book chapters in edited professional books. In 2009, he received the "Outstanding Contribution the Marriage and Family Therapy" award (the 16 awardee in 60 years) from the American Association of Marriage and Family therapy and the next year was named, "2010 Family Psychologist of the Year" by the Academy of Family Psychology. One of his major contributions to the field is the development of a new paradigm of psychotherapy known as the Intersystem Approach. He is also the founder of the systems approach (specifically Intersystem Approach) to sex therapy. Dr. Weeks served as Program Director of COAMFTE-accredited programs for 27 years at the Marriage Council of Philadelphia/University of Pennsylvania School of Medicine (now Council for Relationship) where marriage therapy was first developed. He founded the Institute for Sex Therapy while directing the program at the Marriage Council of Philadelphia. He later developed an undergraduate program in Family Studies and graduate program in Marriage and Family Therapy at the University of Nevada-Las Vegas. Other accomplishments involve being one of the founders of the field of Family Psychology. He was President of the American Board of Family Psychology for two terms and wrote the initial standards for training and Board Certification as a Family Psychologist. Dr. Weeks has lectured and presented training workshops extensively throughout North American, Australia and Europe on sex and couple therapy. Over the past 35 years, he has practiced, taught and supervised individual, sex, couple, and family therapy. Additional information can be obtained by googling, "Gerald R. Weeks" (For a summary of his systems approach to sex therapy please consult the text, Clinical Handbook of Couple Therapy (2015,5th ed.) by Gurman et al.) Weeks and Gambescia have the only chapter on sex therapy in the text.