This book tackles the important issue of the effects of co-occurring substance abuse and mental health disorders on criminal offenders as they make the transition from incarceration back into society. It provides estimates of the prevalence of these disorders among criminal justice populations, and examines the various screening and assessment instruments used to diagnose co-occurring disorders. The volume further offers an inside look at an experimental community reentry program at a jail facility and uncovers how co-occurring disorders jeopardize the transition back into the community for offenders who suffer from them. It incorporates a historical account of the reentry issue to show how the current reentry problem is rooted in criminal justice policies dating back to the 1980s. As such, the text will be a valuable resource for criminal justice and criminology students, as well as practitioners in the corrections field, particularly those who work with inmates or released individuals with substance abuse and mental health disorders.