Systemic Sex Therapy, third edition, edited by Katherine M. Hertlein, is an essential resource for beginning clinicians and graduate students in couple and family therapy programs. Grounded in the Intersystem Approach, this book integrates couple and sex therapy to address a wide range of sexual problems, providing a comprehensive understanding of the biological, psychological, relational, family-of-origin, and contextual factors that influence sexual health. Each chapter delves into the definition, etiology, assessment, treatment, research, and future directions of major sexual dysfunctions, as well as emerging issues such as sexuality and aging, infidelity, disability, and kink/BDSM. Experts in the field contribute to this thoroughly revised edition, which aligns with the DSM-5 and includes new content on culture and technology’s impact on sexual functioning. This book serves as a vital guide for those seeking to develop the skills and confidence needed to effectively treat sexual disorders.