This book aims to meet the need for an exploration of youth justice and youth offending which takes account of the origins and contemporary manifestations of risk-focused work with young people. It analyzes the influence of concepts of risk upon policy development in both England and Wales as well as internationally, highlighting tensions between the proponents of risk factor research and methodological and ethical criticisms of the risk factor paradigm. It will be essential reading for anybody wishing to understand risk factor explanation of crime, contemporary youth justice policy and responses to offending behaviour.