Presents the ways that group processes, peers, and patterns of social relationships can help explain young people’s experiences with delinquency and criminal justice systems. Adopts a social network perspective to deepen the understanding of adolescent crime and gangs and addresses several theories about youth crime and delinquency. Covers key methodological techniques from social network analysis that offer students an opportunity to obtain the tools that can be applied to study various groups, processes, and institutions of interest to juvenile justice scholars (e.g., gangs, schools, neighborhoods).