Book excerpt: Combining theory, research, and case studies, this book shows clinicians how to apply transdiagnostic contextual behavioral approaches when working with sexual and gender minority (SGM) clients. The text first examines minority stress theory through the lens of contextual behavior analysis. Subsequent chapters illustrate the application of therapeutic techniques drawn from acceptance and commitment therapy, functional analytic psychotherapy, and compassion-focused therapy. The book concludes with a close look at special areas of consideration, including pre-surgical evaluation, the impact of HIV on SGM communities, ethical considerations, and future directions in therapy with SGM clients. Every chapter provides a series of diverse vignettes that illustrate how each aspect of treatment might build upon the last along with a list of recommended books for further exploration of that topic. This book offers a unique, integrated approach that can be used for case conceptualization and followed as a treatment manual for professionals or graduate students with a foundation in SGM psychology.