Book excerpt: The fundamental concern of psychotherapy is change. While practitioners are constantly greeted with new strategies, techniques, programs, and interventions, this book argues that the full benefits of the therapeutic process cannot be realized without fundamental revision of the concept of change itself. Applying cybernetic thought to family therapy, Bradford P. Keeney demonstrates that conventional epistemology, in which casue and effect have a linear relationship, does not sufficiently accommodate the reciprocal nature of causation in experience. Written in an unconventional style that includes stories, case examples, and imagined dialogues between an epistemologist and a skeptical therapist, the volume presents a philosophically grounded, ecological framework for contemporary clinical practice.