Digital fortress by Dan Brown (Paperback) Highly Rated eBay Seller Great Prices

Title: Digital fortress Format: Paperback Type: BOOK Publisher: Corgi Books UK Release Date: 05 Jul 2004 Language: English ISBN-10: 0552151696

When the National Security Agency's code-breaking machine encounters a code it cannot decipher, the agency calls in Susan Fletcher, its head cryptographer. She discovers that the agency is being held to ransom with a code so complex that, if it was released, it would cripple U.S. intelligence.