I have a couple paperbacks from Zutz to which I turn fairly often: "Grand Old Shotguns" and "Shotgun Stuff". Both compilations of his articles in Shotgun Sports. "GOS" covers a lot of guns that you won't read much about elsewhere--except maybe occasionally on this BB. The Morrone OU, for example. "SS" covers . . . well, what the title says it covers. Lots of interesting bits and pieces.