Book excerpt: The Wiley Handbook of Developmental Psychopathology offers a concise, up-to-date, and international overview of the study of developmental psychopathology. Examines the cognitive, neurobiological, genetic, and environmental influences on normal and abnormal development across the lifespan Incorporates methodology, theory, and the latest empirical research in a discussion of modern techniques for studying developmental psychopathology Considers the legal, societal, and policy impacts of changes to diagnostic categories in the light of the transition to DSM-5 Moves beyond a disorder-based discussion to address issues that cut across diagnostic categories