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- ISBN: 9781434237644 | 1434237648
- Cover: Hardcover
- Copyright: 1/1/2012
When British Intelligence learns of a German U-Boat anchored off the coast of Sweden, in neutral waters, they enlist the help of an American Naval code-breaking officer to go undercover as Nazis. Their mission: sneak aboard the German sub and liberate the Enigma decoding machine.