Bill O'Hanlon, M.S., has authored or co-authored 20 books and published 43 articles or book chapters. He is a Licensed Mental Health Professional, Certified Professional Counselor, and a Licensed Marriage and Family Therapist. O'Hanlon resides in Santa Fe, NM Tim Rowan, M.S.W., is a clinical social worker and is Professor of Human Services at Allegany College of Maryland. He also maintains a private practice and works as a part-time consultant/therapist for the Addictions and Mental Health Centers of the Allegany County Health Department. Rowan resides in Frostburg, MDO'Hanlon, Bill is the author of 'Solution-Oriented Therapy for Chronic and Severe Mental Illness', published 2003 under ISBN 9780393704235 and ISBN 0393704238.