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About the Book

March 1943, the war hangs in the balance, and at Bletchley Park a brilliant young codebreaker is facing a double nightmare. The Germans have unaccountably changed their U-boat Enigma code, threatening a massive Allied defeat. And as suspicion grows that there may be a spy inside Bletchley, Jericho's girlfriend, the beautiful and mysterious Claire Romilly, suddenly disappears.


From the Paperback edition.

All Editions

9780099527923
Paperback, 5th Edition
ISBN13: 9780099527923
Random House, 2009

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