Combining the author’s extensive clinical experience with contemporary evidence-based research, the chapters of this book explore the origins and development of sexual minority groups, going beyond lesbian women and gay men to include transgender and gender nonbinary people, kink and polyamory, bisexuality and pansexuality, and those who identify as asexual or aromantic. The text also offers in-depth coverage of clinical work with transgender, gender-nonconforming, and nonbinary clients of all ages. With a wealth of therapeutic strategies and case studies, this resource helps professionals respond to this ‘Big Tent’ community in an informed and empathetic way. Spanning sexuality, gender, relationships and age groups, is an invaluable reference for psychotherapists in a broad range of clinical settings.