Rudolf Arnheim's great forte is his ability to illuminate the perceptual processes that go into the making and reception of artworks--painting, sculpture, architecture, and film. Over the years, his pioneering mode of "reading" art from a unique scientific/philosophic perspective has garnered him an established and devoted audience. That audience will take pleasure in Arnheim's most recent collection of essays, one that covers a range of topics and includes titles such as "Outer Space and Inner Space," "What Is an Aesthetic Fact?," "As I Saw Children's Art," "Two Ways of Being Human,"...