This is a must-have book for any therapist treating patients with anxiety, depression, OCD, aggression, pain and a variety of other disorders. Although empirically-supported treatments are the clear gold-standard for treating these problems, clinicians often struggle with how best to balance the need for fidelity in applying manualized treatments with the flexibility necessary to meet the specific needs of a given patient and their family. This book provides expert and highly pragmatic guidance for how to achieve this balance. Dr. Kendall, one of leading developers of empirically-supported treatments, has assembled an all-star cast of clinical researchers and treatment developers to guide readers through the key steps for achieving flexibility with fidelity in service of optimal clinical outcomes.