Hi Dave, I bought both Bowman books years ago. Unfortunately, we now know there is much misinformation/mistakes in them. The most reliable sources from that era which are still used today are the two volumes written by Jean Louis Larcade....Casques a Pointe in French and L’Armee Allemande en 1914 by Didier Laine. This second book is very handy and has drawings, descriptions of helmets, uniforms, shoulder straps for every unit in the German Army in 1914. The text is in French German and English. It is extremely handy and I bring it with me wherever I go to the SOS in Louisville.