Six books: i) The Sheffield Bowie & Pocket Knife Makers 1825-1925, ii) The Sword and Bayonet Makers of Imperial Germany 1871-1918, iii) German Daggers and Dress Sidearm's of World War II, iv) A Primer of German Military Knives of the two World Wars, v) Italian Fascist Daggers, vi) Dagues et Couteaux