An essential reference for therapists interested in understanding the process of change, this book offers the most comprehensive overview of major models of substantive psychological change, addressing a fundamental question of psychotherapy: how do people change? Part I provides a review of major models of psychological change and serves as a reference for therapists working to promote change. Part II builds on prior work on psychological change and proposes a model of how people change in relationally-oriented psychotherapy. The book draws upon multiple sources and theoretical perspectives, incorporating clinical observations and empirical studies, as well as artistic conceptions found in literary and cinematic sources. For psychotherapists and counselors.