Noted for its multisystemic-ecological perspective, this accessible text and practitioner resource has now been revised and expanded with 60% new material. The book provides a comprehensive view of adolescent development and explores effective ways to support teens who are having difficulties. The authors examine protective and risk factors in the many contexts of adolescents' lives, from individual attributes to family, school, neighborhood, and media influences. Assessment and intervention strategies are illustrated with diverse case examples, and emphasize a social justice orientation. Useful pedagogical features include end-of-chapter reflection questions and concise chapter summaries. New to This Edition *Incorporates current research on brain development, resilience, gender diversity, mental health care, and more. *Chapters on new topics: the adolescent brain, trauma, and suicide and self-injury. *Fully rewritten chapters on substance use, queer youth, justice-involved youth, and the joys of working with adolescents. *Reflects the unique contexts and challenges facing Generation Z.