This textbook details how mental health and addiction are interconnected through childhood trauma, how this affects neurobiology and neuropsychology, and the need for an integrated whole-person treatment for those of diverse backgrounds to enhance treatment outcomes.

Using an integrative pedagogy, the book helps readers broaden their understanding of co-occurring disorders through case studies, learning objectives, key terms, quiz questions, suggested resources, and references. By linking to previous knowledge and suggesting practical applications, each chapter provides clear direction for learning more about each treatment approach, diagnosis, and population discussed within the multicultural and biopsychosocial perspective.

Co-occurring Mental Illness and Substance Use Disorders will help graduate students in both substance use and mental health counseling make sense of integrative treatment with co-occurring disorders.

Tricia L. Chandler, PhD, MA, LPC, MAC, HomDI, began her clinical career in 1993 with adults, adolescents, and children with trauma, abuse, and co-occurring disorders in a variety of venues. She has been teaching in online and traditional university graduate counseling programs since 2010.

Fredrick Dombrowski, PhD, LMHC, LADC, has worked in behavioral health since 1999. He has won several awards for his work with marginalized populations. He is the president elect of the American Mental Health Counselors Association.

Tara G. Matthews, PhD, LPC, MAC, has worked in mental health and substance use treatment and prevention since 2004. She has been teaching in higher education since 2008.