Group Work with Populations at Risk, Fourth Edition, edited by Geoffrey Greif, is a comprehensive guide for practitioners in health and mental health settings. This resource equips students and professionals with foundational knowledge and skills necessary for working with vulnerable populations. The book covers a wide array of groups, including returning war veterans, immigrants, the aging and their caregivers, survivors of abuse, individuals dealing with substance abuse, cancer, and chronic mental illness. New to this edition are chapters dedicated to sex trafficking survivors, children in need of social skills training, intimate partner violence victims, homeless parents, and incarcerated fathers. Each chapter offers a detailed exploration of its respective population, including relevant literature reviews, practice principles, case illustrations, evaluation guidance, and references for further reading and online resources.