This psychology textbook provides a comprehensive overview of the central themes and issues in lesbian and gay male studies. The volume reviews the published literature - from classical to the most recent sources - and compiles a collection of primary-source articles representing the best current research and theory. The text pays particular attention to identity development, gender differences, ethnic and racial variation, long-term relationships, adult development and aging. A conclusion calls attention to the need for new models in clinical practice, research and public policy.