National Security Agency, Fort Meade, Maryland : when the most powerful intelligence organization on earth's invincible code-breaking machine encounters a mysterious code it cannot break, it calls for its head cryptographer, Susan Fletcher, a brilliant and 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 ingeniously complex that if released it would cripple US intelligence. Seville, Spain : the creator of the code, Ensei Tankado, is found dead. And with him has died the secret to an impregnable code-writing formula that threatens to obliterate the post-cold war balance of power. Forever. From the underground hallways of power to the skyscrapers of Tokyo to the towering cathedrals of Spain, a desperate race unfolds. Caught in an accelerating tempest of secrecy and lies, betrayed on all sides, Susan Fletcher finds herself fighting not only for her country but for her life and in the end for the life of the man she loves.

Florence : Harvard symbologist Robert Langdon awakes in a hospital bed with no recollection of where hi is or how he got there. Nor can he explain the origin of the macabre object that is found hidden in his belongings.

Violent crime has become a global epidemie, nowhere more so than in the United States. Everything from the death penalty to liberal reforms has failed. Nothing has been effective ....until now !

The NSA's invincible code breaking machine encounters a code that it cannot break. The agency calls in its head cryptographer Susan Fletcher, a brilliant and beautiful mathematician. What she uncovers sends shock waves through the corridors of power.