ciphers

Looks at eight codes and ciphers throughout history that could not be solved.

Jax and Ethan must decode an ancient Greek cipher to uncover the location of two magical urns before the urns are used to remove all faith and love from the world.

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.

"Elusive art thief Lars Heinrich returns to New York City looking to settle a score. Super sleuth seventh-grader Edmund Xavier Lonrrot will need not only his photographic mind and artistic talents, but any skill he possesses with cracking codes as a string of the city's historical monuments become potential clues in what could become one of the greatest heists in history"--Provided by publisher.

Twelve-year-olds Ambrose, Tom, and Frankie are transported to the boys' hometown of Freedom Falls, Ohio, in 1852 when Frankie blows her Romani family's magical trombone, and to return home they will have to use both Morse code and the ancient form of divination known as the I-Ching.

An intruder at mad scientist's Petty Potts' house interrupts her latest experiment, trying REPTOSWITCH on twins Josh and Danny, and when they return home they find a package that sends them on a mysterious quest.

Twins Danny and Josh reveal to neighbor Petty Potts that they have been on a quest to find marbles containing secret code and soon find themselves--as geckos--in her new secret laboratory within the very pink Princessland.

Siblings Dan and Amy Cahill have managed to avert one disaster recreation threatened by the man who calls himself the Outcast, but they have mere days to learn where the Outcast will strike next. The clues are pointing them toward a terrifying air disaster so they naturally think of the Hindenburg disaster, but how can that be the target when nobody in the present day travels by airship?.

This book explores the life of Alan Turing, the man regarded as the father of computer science and artificial intelligence. Readers will discover the fascinating facts of Turing’s exciting code breaking career during World War II, which helped the Allies win many important battles. The text includes details about his designs for one of the first computers, and how his work laid the foundation for other computer pioneers.