Book excerpt: This book explores medical nonadherence to treatment and management of psychiatric disorders across the lifespan. Leading experts in the field, specializing in a range of mental health problems describe the impact of nonadherence in the treatment of children, adolescents, transition age youths, adults, and older adults. The book eloquently articulates the key elements of effective physicians and offers clinical pearls on professionalism, empathy, and the doctor-patient relationship—a key component to solving treatment nonadherence. This volume focuses on solutions for improved clinical outcomes, including communication skills, empathy and building trust, motivational interviewing techniques and the use of technology. Psychiatric Nonadherence is an excellent resource for all clinicians who care for individuals with psychiatric illness. This timely reference will provide guidance to enhance effective treatment adherence for a wide array of medical practitioners, including child and adolescent, adult forensic, and geriatric psychiatrists, addiction medicine specialists, primary care physicians, psychologists and nurses.