ciphers

"Chris Kingsolver has always been especially close to his aunt. He's heartbroken when she dies in a car accident--and shocked to get a coded letter in the mail after her death. Elsie left Chris clues to the location of a lost treasure ship as an inheritance--if he, his cousin Carrie, and their new friend Maddison can find it. But that might be difficult, what with the mysterious people stalking them, and the strange behavior of the new archivist. And was Aunt Elsie's death really an accident?"--Back cover.

Scholar Jules Addison and scavenger Amelia Radcliffe join forces to unravel secrets of a long-extinct civilization, only to discover something that could spell the end of the human race.

Logan's lie about liking to break codes comes back to haunt him when Quinn gives him a message to decode, and he must either figure out the code or tell Quinn the truth.

Math has always been key to warfare. From making sure an army has enough supplies to recording casualties and damage, discover how math and calculations lie at the heart of warfare.

The stories of some of the individuals who have shaped cryptography are engagingly told in this narrative.

Readers can anticipate an intriguing overview of the ciphers, codes, algorithms, and keys used in real-life situations to keep peoples' information safe and secure.

"... Team Mystic discovers a mysterious code--and it just might be the key to catching 'em all"--Provided by publisher.

Examines the history of cryptography, from encryption in Ancient Greece to the role it plays in our modern daily lives. Includes a glossary, resources for further information, and color photographs.

The members of the Code Busters Club take a class trip to Angel Island, the Ellis Island of the West, where they discover a mysterious box with a connection to one of the Code Busters.

After twelve-year-old Addison Cooke's uncle unearths ancient Incan secrets in Peru, he is kidnapped by a shadowy organization intent on stealing the treasure unless Addison and his friends can decipher the clues first.