Archaeologist Tess Chaykin and FBI agent Sean Reilly investigate the theft, by four horsemen dressed as Knights Templar, of a coding device that could reveal the order's secrets about early Christian history.
Tom Jericho has been called out of retirement to join in a race to crack the Nazi's secret code, Enigma, in order to save Allied troops from a deadly German attack.
Amy and Dan, members of the powerful Cahill family, try to uncover the thirty-nine clues which will reveal the secrets of their lineage and find out what really happened to their parents.
Amy and Dan, following a clue found in Book 3, set out to uncover details about the origins of the rivalry between the Tomas and Ekaterina branches of their family, not realizing they are headed right into the hands of the enemy.
Zoe's sixth-grade year at a Brooklyn school for gifted students is marked by changing relationships with her fellow students and teachers, recognition of her talent for cryptography, and a greater awareness of her passion.
how the code rebels beat the government, saving privacy in a digital age
Levy, Steven
2001
Discusses how computer hackers and mathematical wizards managed to break the government's secret codes and explains how this breach of privacy has threatened the United States economy.
After being taught in a boarding school run by whites that Navajo is a useless language, Ned Begay and other Navajo men are recruited by the Marines to become Code Talkers, sending messages during World War II in their native tongue.
all about notes, from secret codes and special inks to fancy folds and dead man's drops
Bailly, Sharon
1995
Examines the history of writing and provides instructions for making special inks, using various alphabets and codes, and creating personal seals and private letter drops.
