f the most savage and strategically significant campaigns of World War II: 28,000 out of 39,000 men in the German U-boat force disappeared beneath the waves. Herbert A. Werner, one of the few surviving German U-boat commanders, served on five submarines from 1941 to 1945. From the Atlantic to the Mediterranean, from the English Channel to the North Sea, he takes the reader with him through the triumphant years of 1941 and 1942, when German U-boats nearly strangled England, to the apocalyptic final years of destruction, disillusionment, and defeat.