For 25 years, Lewis's Child and Adolescent Psychiatry has been the cornerstone of every child and adolescent psychiatrist’s library. Now, three colleagues of Dr. Lewis at the world-renowned Yale Child Study Center, have substantially updated and revised this foundational textbook for its long-awaited fifth edition, the first in ten years. Encyclopedic in scope, it continues to serve as a broad reference, deftly encompassing and integrating scientific principles, research methodologies, and everyday clinical care.