The aim of this Handbook of Homework Assignments in Psychotherapy: Research, Pr- tice, and Prevention is to provide comprehensive resource on the role of homework assignments in psychotherapy and prevention. However, the process of generalizing in-session therapeutic work through between-session activity has a long history in psychotherapy. This Handbook is designed to elucidate and extend that history by presenting theoretical and clinically focused descriptions of the role of homework assignments in a range of psychotherapies, clinical populations, and presenting pr- lems. Designed for both the beginning and the experienced psychotherapy prac- tioner, this Handbook assumes a basic knowledge of psychopathology and practice of psychotherapy and prevention. The Handbook aims to contribute to the professional resources for all psychotherapy practitioners and researchers, in private and public practice, graduate students in clinical and counseling psychology, couple and f- ily therapists, as well as residents in psychiatry. This book does not aim to review the theories of psychotherapy in detail, speci?c treatments of psychopathology, cl- ical assessment, or basic psychotherapy and prevention processes that are currently available in numerous psychotherapy textbooks. This Handbook is a clinical resource designed to provide a focused coverage of how to integrate homework assignments into psychotherapy practice, and in the prevention of mental illness. Outline for the Handbook This Handbook comprises four distinct parts.