Crossing the Atlantic is challenging enough … but when the destroyers attached to their convoy torpedo a U-boat, events take another very surprising turn. The U-boat was transporting a secret: a secret that Jack and George’s mother is now entrusted with … and a secret that the Nazis will kill to protect. When the family comes ashore in England, they’re whisked off to Bletchley Park, the hub of the British spy network, so that they can help to decipher it.
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