Book excerpt: Health and well-being during adolescence depends largely on the fit between the young person's developmental needs and desires and opportunities provided by the changing context. In Health Risks and Developmental Transitions, prominent researchers in the adolescent field examine how various developmental transitions associated with the passage from childhood to adulthood provide risks and opportunities for adolescents' mental and physical health. Given the importance of adolescence in determining the course of health and well-being across the life span, efforts to ease the various transitions into and out of adolescence will yield long-term health benefits. By focusing on the link between health risks, developmental transitions, individual and contextual conditions and planned interventions that moderate the link, this interdisciplinary book provides the foundation for a unifying framework for research and application in health and human development.