This book aims to provide an understanding of youth offending and policy and practice responses, particularly the risk-focused approaches that have underpinned much recent academic research, youth justice policy and interventions designed to reduce and prevent problem behaviour. There has been growing concern, however, on the part of critical criminologists and others, about the theoretical, epistemological, methodological and ethical bases of risk-focused research with young people. They have pointed particularly to the overly-deterministic and prescriptive nature of the risk factor paradigm. 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 analyses 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.