Mental health-substance use is a complex interrelation, with equally complex implications for individuals and their families, health professionals and society. Although its international recognition as an issue of critical importance is growing, clear guidance for professionals on mental health-substance use and its treatment is hard to find. The Mental Health-Substance Use series addresses this need, concentrating on concerns, dilemmas and concepts that impact on the life and well-being of affected individuals and those close to them, and the future direction of practice, education, research, services, interventions, and treatment. Having outlined the field and service development in previous books, the third book in the series explores how professionals can best respond to the particular concerns and dilemmas arising from and in mental health-substance use for individuals and their families. It aims to inform, develop and educate these responses by sharing knowledge and enhancing expertise in this fast-developing field by exploring the interrelated psychological, physical, social, legal and spiritual experiences. The volumes in this series are designed to challenge concepts and stimulate debate, exploring all aspects of the development in treatment, intervention and care responses, and the adoption of research-led best practice.