Approximately 43 firearms and firearm history books including but not limited to: "Twentieth-Century Small Arms" by Chris McNab, "United States Martial Pistols & Revolvers" by Arcadi Gluckman, "The Muzzle-Loading Cap Lock Rifle" by Ned H. Roberts, "The Encyclopedia of Sporting Firearms" by David E. Petzal, "Civil War Guns" by William B. Edwards, and "Marlin Firearms" by Lt. Col. William S. Brophy.