This book held great promise for me. But as I read through it, I began to realize how few real facts about the Superposed it actually contained. Oh, there are plenty of sales charts and market projections... photos of beautiful guns, too. But these can only suffice to a point. The collector and aficionado wants to know more than the story of engraving and sales histories. The inside story of the gun is crtical. The steels. The design. The mechanism's function and evolution. And with so much access to the FN records and personnel, actual on-site contact in Liege, and an apparent interview with the late Val Browning, author Schwing managed to reveal very little beyond the empirical. Many of the facts that are contained in the book are also repeated. Some more than twice. It's still a great photo feast, however. And it inspired me to go out and buy two Superposed shotguns. So the book does have a certain value.