Jon Hershfield, MFT , is director of The Center for OCD and Anxiety at Sheppard Pratt in Towson, MD. He specializes in the use of mindfulness and cognitive behavioral therapy (CBT) for obsessive-compulsive disorder (OCD) and related disorders. Jon is a member of the Scientific and Clinical Advisory Board of the International OCD Foundation, and is on the faculty of their Behavioral Therapy Training Institute. He is author of Overcoming Harm OCD , When a Family Member Has OCD , and The OCD Workbook for Teens ; and coauthor of The Mindfulness Workbook for OCD and Everyday Mindfulness for OCD . Blaise Aguirre, MD , is assistant professor of psychiatry at Harvard Medical School, and an expert in child, adolescent, and adult psychotherapy, including dialectical behavior therapy (DBT), He is founding medical director of McLean 3East--a continuum of care using DBT and related techniques to treat complex psychiatric disorders including borderline personality disorder (BPD). Aguirre has been a staff psychiatrist at McLean since 2000, and is internationally recognized for his extensive work in the treatment of mood and personality disorders in adolescents. He lectures regularly in Europe, Africa, and the Middle East on DBT and BPD. Aguirre is author of many books, including Borderline Personality Disorder in Adolescents and Depression ( Biographies of Disease ); and coauthor of Mindfulness for Borderline Personality Disorder , Coping with BPD , DBT for Dummies , and Helping Your Troubled Teen .