- Author: Dan Brown
- Format: Paperback
- Publisher: Transworld Publishers Ltd
- Published: 28 August 2009
- ISBN: 9780552159739
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When the National Security Agency's 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. The NSA is being held hostage - not by guns or bombs, but by a code so complex that if released would cripple U.S. intelligence. Caught in an accelerating tempest of secrecy and lies, Fletcher battles to save the agency she believes in. Betrayed on all sides, she finds herself fighting not only for her country but for her life, and in the end, for the life of the man she loves...
Dan Brown is the bestselling author of Digital Fortress, Deception Point, Angels and Demons, The Da Vinci Code and The Lost Symbol. He is a graduate of Amherst College and Phillips Exeter Academy, where he has taught English and Creative Writing. He lives in New England.