Established for fifteen years as the standard work in the field, Melvin Lewis's Child and Adolescent Psychiatry: A Comprehensive Textbook is now in its Fourth Edition. Under the editorial direction of Andrés Martin and Fred R. Volkmar--two of Dr. Lewis's colleagues at the world-renowned Yale Child Study Center--this classic text emphasizes the relationship between basic science and clinical research and integrates scientific principles with the realities of drug interactions. This edition has been reorganized into a more compact, clinically relevant book and completely updated, with two-thirds new contributing authors. The new structure incorporates economics, diversity, and a heavy focus on evidence-based practice. Numerous new chapters include genetics, research methodology and statistics, and the continuum of care and location-specific interventions.