Book excerpt: The Cambridge Handbook of Sexual Development is a carefully curated conversation that brings together the top researchers in child and adolescent sexual development to redefine the issues, conflicts, and debates in the field. The Handbook is organized around three foundational questions: first, what is sexual development? Second, how do we study sexual development? And third, what roles might adults - including the institutions of the media, family, and education - play in the sexual development of children and adolescents? As the first of its kind, this collection integrates work from sociology, psychology, anthropology, history, education, cultural studies, and allied fields. Writing from different disciplinary traditions and about a range of international contexts, the contributors explore the role of sexuality in children's and adolescents' everyday experiences of identity, family, school, neighborhood, religion, and popular media.