Authors frequently write texts because they cannot find a book that they feel is appropriate for a course they are teaching. We were motivated by this reason and many others in our desire to publish Systemic Sex Therapy. As marriage and family therapists, we were searching for a book that would serve as an introduction to the field of sex therapy from a systems perspective. The target audiences for this book are graduate students in marriage and family therapy programs or students and professionals who want a truly fresh perspective on sex therapy. We also wanted to write a book that is comprehensive, concise, highly focused on treatment, and user friendly. Current books on the market impress us as being outdated, too advanced, simplistic, unfocused, or too diffuse in content.