For the professional psychologist this book represents yet another hopeful sign that psychology is leaving the Tower of Babel. For the physician, lawyer, educator, nurse, or social worker interested in replacing "on faith" acceptance of the psychologist's findings by a sophisticated understanding of the process of psychological diagnosis, this may well prove an indispensable book. The explicit aim of the authors, both professors of medical psychology at the University of Maryland School of Medicine, is to make psychological assessment procedures comprehensible to persons without specialized training in the field. They require of themselves full clarity without superficiality. The literature on psychodiagnosis is notoriously cluttered with vocabulary specific to individual assessment techniques such as the Rorschach or the MMPI. No encompassing framework of generally accepted personality theory is available to the would-be integrator of findings from diverse sources and points of view. Thus the authors have undertaken a difficult and important task.