This exciting and engaging textbook introduces students to the psychology of lesbian, gay, bisexual, trans and queer lives and perspectives. It covers a broad range of topics including diversity, prejudice, health, relationships, parenting and lifespan experiences from youth to old age. The book includes 'key researcher boxes', which outline the contributions of significant individuals and their motivation for conducting research in this field. Key issues and debates are discussed throughout the book, and questions and classroom exercises help students to reflect and apply their learning. There are extensive links to further resources and information as well as 'gaps and absences' boxes, which highlight the major limitations of research in particular areas, encouraging students to approach their research critically. This is the essential textbook for anyone studying LGBTQ Psychology, Psychology of Sexuality or related courses. It is also a useful supplement to courses on gender and developmental psychology.