Publisher's blurb Time: June, 1943 Place: North Atlantic German Wolf Packs have been driven from their hunting grounds by Allied escort vessels and massive air attacks. But unknown to the Allies is a Nazi super sub completed well ahead of schedule: The Mark XXI. Der Führer has demanded total destruction of enemy merchant shipping - a vital link for continue success of the Allied war effort. Will you, as one of the Kriegsmarine's remaining ace skippers, alter history and save the Third Reich from defeat? Der Führer will not be disappointed!