Featuring focused material and contemporary research, Adolescent Development: Ages Nine to Nineteen introduces readers to issues that affect the daily lives of tweens and teens. The anthology focuses on three key constructs that require special attention for youths in this age group: the physical, the psychological, and the social. The collection begins with a unit that familiarizes students with foundational theories of adolescent development. Unit II contains readings related to cognition, including brain development, decision-making, and trauma-informed treatment for adolescents. In Unit III, students read about physical development, wellness, and nutrition. Unit IV focuses on aspects of social-emotional development, including social achievement goals, the school context and relationships, and autism. Unit V highlights risk factors and delinquency, highlighting factors that contribute to delinquency, the relationship between self-esteem and substance abuse, the modern reality of cyberbullying, and more. The final unit examines the American family, the process of coming of age, and obstacles of emerging adulthood. Adolescent Development is an ideal resource for courses in pre-adolescent and adolescent human development, as well as courses in psychology, social work, behavioral sciences, and sociology. Kelli Jette, Ph.D., is the program coordinator and assistant professor of Human Development and Community Engagement at the University of Cincinnati, where she has taught undergraduate courses for nearly a decade. She completed her master's degree in special education from Xavier University and her Ph.D. in educational studies from the University of Cincinnati.