ciphers

When a rare coin and a strange code are uncovered in McKenna School, Malcolm and the other classroom pets of the Midnight Academy take on their most challenging assignment yet and, through their investigations, they just might save the school from closing.

"When a strange message is found hidden on the casket of Pharaoh Raneb, the Museum Mystery Squad must crack a code nobody's seen since ancient Egyptian times. But this mummy's keeping mum. The Squad are not the only ones working on the mystery: they meet Egyptian expert Professor Peter Gyptex, and the very odd Vera Damclot, a fan of mummified cats. Can the Squad reveal the mummy's secret before it unravels?"--Amazon.

"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.

On the morning of June 12, 1962, guards at Alcatraz Prison discovered that inmates Frank Lee Morris, John William Anglin, and Clarence Anglin were missing from their cells. The inmates had fashioned dummy faces in their bunks and escaped the island prison using a makeshift raft constructed of rubber raincoats. Although the FBI conducted an exhaustive investigation, no evidence was located that the three escaped convicts ever reached the shore. Morris, and both Anglins were presumed to be dead.

When a mysterious letter written in code arrives at King's house for his human, Kayla, he follows the trail of the person who left it.

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.