A groundbreaking book when first published, A Materialist Theory of the Mind remains today one of the most important, influential, and penetrating discussions of the mind available. In addition to advancing a powerful defense of mind-body materialism, it contains rich and illuminating treatments of all the main aspects of mental functioning, from perceiving and mental imagery to thinking, willing, and introspection. At once sophisticated and highly accessible, this is a book anybody interested in the mind should have. Armstrong's informative new Preface for the Revised Edition is an added bonus, giving both overview and historical context and occasionally fine tuning his original discussion. - David Rosenthal, City University New York