Digital Fortress

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 it" 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...
Praise for THE Da Vinci Code:

"WOW... Blockbuster perfection. An exhilaratingly brainy thriller'
THE NEW YORK TIMES

'A new master of smart thrills... A pulse-quickening, brain-teasing adventure' PEOPLE MAGAZINE