All Formats & Editions

"LITERATE AND SAVVY . . . BRIMS WITH WARTIME INTRIGUE." --The Washington Post Book World England 1943. Much of the infamous Nazi Enigma code has been cracked. But Shark, the impenetrable operational cipher used by Nazi U-boats, has masked the Germans' movements, allowing them... Read Full Overview

"LITERATE AND SAVVY . . . BRIMS WITH WARTIME INTRIGUE." --The Washington Post Book World England 1943. Much of the infamous Nazi Enigma code has been cracked. But Shark, the impenetrable operational cipher used by Nazi U-boats, has masked the Germans' movements, allowing them... Read Full Overview

"LITERATE AND SAVVY . . . BRIMS WITH WARTIME INTRIGUE." --The Washington Post Book World England 1943. Much of the infamous Nazi Enigma code has been cracked. But Shark, the impenetrable operational cipher used by Nazi U-boats, has masked the Germans' movements, allowing them... Read Full Overview

"LITERATE AND SAVVY . . . BRIMS WITH WARTIME INTRIGUE." --The Washington Post Book World England 1943. Much of the infamous Nazi Enigma code has been cracked. But Shark, the impenetrable operational cipher used by Nazi U-boats, has masked the Germans' movements, allowing them... Read Full Overview

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... Read Full Overview