Great history of all Germany’s U boats of WW2, 75% would die in service. The Admiral of the U Boats would take Hitler’s place, of course Hitler was never brave at sea, most of German conquest would be land battles. After Bismarck was sunk, Germany depended on the U Boats, just like WW1. The British navy was declining, however the American navy was expanding. Airplanes turned the tide in the war in the North Atlantic, where ever there were air patrols the U boats had to retreat to safe haven below the waves.
Of course British and American navies updated weapons and systems, Greyhound a movie with Tom Hanks, but the battles were a steady attrition on both sides. What the German’s attempted to do in the Atlantic, the Americans sank most of the Japanese merchant in the Pacific. This book shows the German’s steady progress, how the happy time in the beginning of the war, seemed like it might bring Britain to it’s knees. What was most interesting is how far the German’s advanced the design, gone were the guns on deck, subs got faster underwater, snorkels allowed running of Diesel engines and for the sub to be below the surface. But the new designs came to late, most would never fight, but the development of the modern sub had its genesis in German designs.