The "Brophy Book" has become the L.C. Smith collector's bible. It is comprehensive with many good illustrations. Undoubtedly, it is incomplete and contains errors. But, no other author has come close to the late Col. Brophy's effort. The serious fan of L.C. Smith shotguns should also see Brophy's companion book, "Plans-L.C. Smith Shotguns", which contains useful data regarding dimensions, screw sizes, etc. That volume also has instructions for reassembly of the top lever screw (a tricky operation) and dimensions for the hammer cocking tool. Unfortunately, both volumes are out of print, hard to find, and expensive.