David Hockney is possibly the world's most popular living painter, but he is also something else: an incisive and original thinker on art. This now classic book details the fruits of his lifelong meditations on the problems and paradoxes of representing a three-dimensional world on a flat surface. How does drawing make one "see things clearer, and clearer, and clearer still," as Hockney suggests? What significance do different media--from...