Sexual orientation has been explored and studied by psychologists and researchers as evident by the book Sexual Orientation and Mental Health: Examining Identity and Development in Lesbian, Gay, and Bisexual People edited by Allen M. Omoto and Howard S. Kurtzman. This excellent volume is a must have resource for psychologists, seasoned or early career, who are working in the areas of mental health, substance abuse, and selfidentity development with individuals who are lesbian, gay, or bisexual. Each of the chapters are well written, easy to read, and provide opportunities for discussion and future research directions even for the next generation of psychologists interested in this area. Therefore, this volume can be a very useful textbook for graduate courses specializing in sexual orientation. Additionally, this book also suggests that psychologists and researchers today have an easier access to such populations than in past decades to conduct research in order to understand the needs in mental health of this specific population despite societal misunderstandings. This book is divided into two sections, one focusing on youth and the other on adults. Each section presents interesting and significant research findings such as in the chapter by D’Augelli who discusses youths being aware of their same-sex feelings starting approximately the age of 10 and self-labeling their sexual orientation 5 years later, and in the chapter by Diamond who discusses sexual identity development and sexual questioning as a continuous process for females. In the adult section of the book, Matthews, Hughes, and Tartaro describe research about lesbians being more likely to seek mental health for sexual problems than heterosexuals, in the chapter by Diaz, Bein, and Ayala, they investigate ethnic groups such as Latino gay men. Another chapter by Sterk and Elifson discusses lesbians who are African Amercian. While this text is culturally diverse in sexual orientation and discusses bisexuality, one population missing from this book are individuals with disabilities who are gay, lesbian and bisexual. Several years of outstanding research work is represented in this book which provides an understanding about early years when discrimination and stigma of sexual orientation