Now in an updated and expanded second edition, this volume offers comprehensive guidance and background material on decision-making in cases where future violence is a potential issue. It outlines best practice in conducting violence assessments of individuals in varied contexts, including civil psychiatric hospitals, forensic mental health services and the criminal justice system. The authors detail the operation of criminal and mental health codes internationally, with a particular focus on Canada and England, and synthesize commonly agreed principles appropriate for use in assessing a client's propensity for committing violence.  This new edition reflects a general change in violence risk assessment and management, with structured professional judgement now a well established approach, and engages with the growing attention paid to the role of protective factors when evaluating and managing violence risks. It demonstrates today's closer integration of risk assessment and treatment, covered in discrete chapters on planning and formulation.