In What Photography Is, James Elkins examines the strange and alluring power of photography in the same provocative and evocative manner as he explored oil painting in his best-selling What Painting Is. In the course of an extended imaginary dialogue with Roland Barthes's Camera Lucida, Elkins argues that photography is also about meaninglessness--its apparently endless capacity to show us things that we do not want or need to see--and also about...