
- Publisher:
- LADYBIRD
- Year of publication:
- 2009
- ISBN:
- 978-0-552-15973-9
- Pages:
- 510
DIGITAL FORTRESS
DAN BROWN
When the National Security Agency's code-breaking machine encounters a code it cannot decipher, the agency calls in Susan Fletcher, its head cryptographer. She discovers that the agency is being held to ransom with a code so complex that, if it was released, it would cripple U.S. intelligence.