ciphers

Told in multiple voices, fifteen-year-old Jamaican Louisa Adair uncovers an Enigma machine in the small Scottish village where she cares for an elderly German woman, and helps solve a puzzle that could turn the tide of World War II.

Skilled code-cracker and detective Ruby Redfort and her sidekick butler Hitch work for a secret crime-fighting organization called Spectrum, and Ruby remains calm as they face evil villains.

Discusses the difference between codes and ciphers, examines common codes and ciphers that have been used during wars, and explains how to create simple ciphers.

"The Queen needs Mac to crack the code and save the Video Game World Championships"--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.

When twelve-year-old painter Esther gets stuck at math camp rather than art camp, she is determined to prove herself but someone leaves cryptic messages intended to drive her away.

"Cryptography is a powerful tool that's been used throughout history--for good and for bad. Learn to make and break the same ciphers used by monarchs, spies, and soldiers. Then put your knowledge to the test by creating your own secret messages for friends and family"--Back cover.

Kiki and her friends learn about coding as they compete to be the escort for young narwhal who will visit Trident Academy with her famous parents. Includes glossary, key to the codes used, and information about safeguarding narwhals' habitats.

Second-grader Sam Graham wants a cell phone to do research and share information but when his parents say no, he devises a new plan that starts a fad at school.

Ethan and Devin have finally gotten the puppy of their dreams! Even better, taking their new pup to the dog park near the lake means the chance to explore a new Pokemon GO habitat! But the energetic puppy chews on everything in sight, including a map.