Description
When the National Security Agencys invincible code-breaking machine encounters a mysterious code it cannot break, the agency calls in its head cryptographer, Susan Fletcher, a brilliant, beautiful mathematician. What she uncovers sends shock waves through the corridors of power. Paperback , 512 pages Published August 28th 2009 by Corgi Books (first published February 1998)
When the National Security Agencys invincible code-breaking machine encounters a mysterious code it cannot break, the agency calls in its head cryptographer, Susan Fletcher, a brilliant, beautiful mathematician. What she uncovers sends shock waves through the corridors of power. Paperback , 512 pages Published August 28th 2009 by Corgi Books (first published February 1998)