This introduction presents an overview of key concepts discussed in the subsequent chapters of this book. The book provides a bridge between academic learning and clinical training. Academic study gives us the conceptual knowledge for clinical work, and clinical training gives us the applied experience of working with individuals and families as a case manager, psychotherapist, crisis intervention specialist, or behavioral health practitioner. Behavioral health care is sometimes provided in a medical setting as an adjunct to physical health care, and the term is also used to refer to freestanding outpatient clinics and treatment centers. In recent years, the field of psychotherapy and behavioral health treatment has seen an emphasis on a strength-based, recovery model of treatment. The use of evidence-based treatment approaches and principles has improved the treatment effectiveness for a number of conditions and has expanded the population that can benefit from treatment.