Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Too few models featured, illustrated with inferior photos.

This book comes across as being written by an enthusiast, but the illustrations are of the really muddy, dull and just plain dull type. It's okay as far as it goes (if one ignores the photos) but it doesn't go far enough. It is also written from one nation's viewpoint. Collecting cameras actually changes from country to country, and what is just another Argus may be someone's rare collection centrepiece. It's an adequate starting point to get someone collecting cameras, but not of very much use to the more experienced photographic collector.