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.

This is a 48 page volume that includes line drawings, photographs, and charts.

Covers the ships, commanders, harbors, bases, uniforms and insignia of the U-Boot Waffe in over 270 photos.