Radovic, Branislav German Helmets of the Second World War: Vol One: M1916/18, M1932, M1935, M1940, M1942, M1942/45 (0764314475)
This two volume set is a fully illustrated, detailed look at the famous German 'stahlhelm' of World War II. Full color photographs - including multiple-view, interiors, and up-close detail - show Army, Luftwaffe, Kriegsmarine, Waffen-SS, Paratroop, and many others. Both volumes have been specifically produced to give the advanced collector the opportunity to expand his or her knowledge, and to compare paint and insignia against their own collections. For the novice or would-be collector, these books are an invaluable reference.