The German U-boat Type XXI was a revolutionary marvel at the time of its development, close to the end of World War II. This book covers the history leading up to the development of the Type XXI, as well as covering the actual development and short usage of the U-boat.[AuthorName]By (author) Siegfried Breyer[/AuthorName][AuthorBio][/AuthorBio][NumIllustration]over 100 b/w photos, drawings[/NumIllustration][CoAuthor][/CoAuthor][SubTitle][/SubTitle][ColorPattern]over 100 b/w photos, drawings[/ColorPattern]