The story of David Hockney is one of passion: passion for seeing, passion for telling, passion for images. But to these should be added passion for life. Hockney's art is a celebration of what it is to be alive. All his pictures--sometimes tender, as when he draws close friends and family; sometimes playful, as in his paintings of lazy, carefree days at the pool; sometimes awe-inspiring, as with his monumental images of the Grand Canyon--convey...