Clinical Treatment Directions for Infidelity  deepens and extends the BBC interview on the Why Factor and Big Ideas podcast at the California Institute of Integral Studies by providing a more thorough exploration of research and clinical case studies which answer the question of why people cheat.   It also provides direction for moving forward for those who betray, those who are betrayed, third parties involved in the betrayal and the therapists who treat these cases.   Clinical Treatment Directions for Infidelity is used in sex therapy training courses, human sexuality courses and workshops, and couples counseling courses, and is an essential framework for clinicians who work with cases of infidelity.  It is also a must-read for those who are dating, forming committed relationships, or experiencing the aftermath of a betrayal.  It is an antidote to the many problematic stereotypical musings about infidelity that are available in media and books that are not rooted in research or clinical experience. "This book is a brilliant reflection on the lived-experience of infidelity. In this book, you will find a well-documented and developed ethic that does not fall in the usual and useless dichotomy of good and bad and is free from any moralistic judgment. I strongly recommend this book to all the people who want to undertake an honest analysis on the topic." ―Susi Ferrarello, PhD, lecturer at California State University, USA, and philosophical counselor "Well-written, engaging, and grounded in practical experience, this text presents readers with a comprehensive understanding of the lived experience of those who have gone through infidelity. It goes beyond a prescription of what to do in treatment, but rather guides a clinician through their own treatment strategies by providing thorough context, perspective, and information. This is a must-have for anyone working with infidelity." ―Katherine M. Hertlein, PhD, LMFT, professor and program director of the Couple and Family Therapy Program at the University of Nevada, Las Vegas, USA Nicolle Zapien, PhD, is a licensed psychotherapist in private practice in San Francisco, an AASECT certified sex therapist.  She is also the founder of the largest sex therapy training program in San Francisco. She holds a PhD in psychology from Saybrook University, an MA in counseling psychology from the Professional School of Psychology, and an EdM in teaching and curriculum from Harvard University. She lives in Berkeley, California, with her husband, two children, and beloved rescue dog.