This is a very useful critical anthology of writings by Sontag on the topic of photography. Each paper has strengths and weaknesses in its own right. Personally I felt that it started weakly, on a semi-philosophical drive into the history of photography, but late papers (particularly "The Heroism of Vision" and "The Image-World") offer up deep insights into the technology and art historical criticism of photography. These are fascinating, and have made this a thoroughly worthwhile read.