This book is a nontechnical, accessible, scholarly volume about criminal trajectories within a developmental context. The book provides a comprehensive overview of criminal trajectories as a concept and methodology. It addresses the complexities, controversies, findings, and applications from the rich criminal trajectory literature. It synthesizes material from the current literature in a range of fields, including developmental psychology, developmental and life-course criminology, quantitative methods, and crime prevention, to illustrate the theoretical, empirical, and practical utility of considering the heterogeneity underlying offender populations (i.e., of criminal trajectories) in the conceptualization, response to, and prevention of crime. Each chapter ends with suggested supplemental readings.