Book excerpt: Thousands of readers who have profited from engagement with the lively mind of Rudolf Arnheim over the decades will receive news of this new collection of essays expectantly. In the essays collected here, as in his earlier work on a large variety of art forms, Arnheim explores concrete poetry and the metaphors of Dante, photography and the meaning of music. There are essays on color composition, forgeries, and the problems of perspective, on art in education and therapy, on the style of artists' late works, and the reading of maps. Also, in a triplet of essays on pioneers in the psychology of art (Max Wertheimer, Gustav Theodor Fechner, and Wilhelm Worringer) Arnheim goes back to the roots of modern thinking about the mechanisms of artistic perception.