World War II submariners rarely experienced anything as exhilarating or horrifying as the surface gun attack. Between the ocean floor and the rolling whitecaps above, submarines patrolled a dark abyss in a fusion of silence, shadows, and steel, firing around eleven thousand torpedoes, sinking Japanese men-of-war and more than one thousand merchant ships. But the anonymity and simplicity of the stealthy torpedo attack hid the savagery of warfare --...