Das Infanterie-Sturmabzeichen by Sascha Weber
It is now available in english also: The Infantry Assault Badges
The Flak Badges by Mark Garlasco
Der Krimschild by Sascha Weber
Das Erdkampfabzeichen der Luftwaffe by Sascha Weber
More info on
http://www.militariafachbuch.eu/.
Best regards, Janos