Not as authoritative as other books on this subject, and I found too many personal assumptions that I had to disagree with. When I saw an opening page with a picture of a non-coupled rangefinder Argus model C identified as a "Argus C3", I was a bit disappointed. Also, the quality of the photos and the composition themselves is sorely lacking in a book by a fellow who obviously considers himself somewhat of an accomplished photographer. B&W photos often muddy, and poorly focused. That said, however, overall a fairly informative and entertaining read for the beginning camera collector, despite some errors.