Description
- This book is in a reasonable condition.
- You can expect some folded corners/pages, a damaged cover and/or spine, and yellowed pages.
A member of a top-secret team of British cryptographers, Tom Jericho succeeds in cracking “Shark,” the impenetrable operational cipher used by Nazi U-boats, but when the Germans change the code, Jericho must break the new code before the traitor among his group can stop him.
