This book provides an unprecedented pictorial account of German U-boats during World War II. It draws upon numerous unpublished photographs from French and German archives, offering a visual record of these vessels. The work includes 16 pages in color and an extensive file of technical data profiling all major German submarine types operated between 1939 and 1945.

The book is presented as a comprehensive visual and technical reference for German U-boats in World War II. Its strength lies in the inclusion of numerous unpublished photographs and detailed technical specifications, suggesting it appeals to historians and enthusiasts of naval warfare. The focus on archival material indicates a depth of research aimed at providing an authoritative perspective on the subject.