Introduction: how to read and use this book; Part I. History, Contexts and Debates in LGBTQ Psychology: 1. Introducing LGBTQ psychology; 2. Key debates and perspectives; 3. Doing LGBTQ psychological research; Part II. Understanding Social Marginalisation in LGBTQ Lives: 4. Diversity; 5. Prejudice and discrimination; 6. Health; Part III. LGBTQ Experiences Across the Lifespan: 7. Young people, coming out and identity development; 8. Relationships; 9. Parenting and family; 10. Ageing and old age; Conclusion: 11. The future of LGBTQ psychology; Glossary.