Hard to find out of print reference book: "The Flak Badges" by 'Marc E. Garlasco'. This hardcover book features 464 pages full of information regarding all types of Luftwaffe Flak Badges, award-documents, boxes etc and is certainly the best book available on this subject. The book is showing some normal traces of usage. Super must-have reference work for the Luftwaffe Flak Badge collector!