Mystery

A shocking scientific discovery. A conspiracy of staggering brilliance. A thriller unlike any you've ever read.... When a new NASA satellite spots evidence of an astonishingly rare object buried deep in the Arctic ice, the floundering space agency proclaims a much-needed victory… a victory that has profound implications for U.S. space policy and the impending presidential election.

When the NSA's invincible code-breaking machine encounters a mysterious code it cannot break, the agency calls 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 U.S. intelligence.