ciphers

A discussion of the history and future of coding theory celebrates the ingenuity of language systems and their uses from Braille and Morse code through binary codes to 32-bit operating systems.

Marigold concocts a mystery that finally gets her and her friends into the boys' private eye club.

Presents instructions for speaking thirteen secret languages, including Pig Latin, one of the best known and easiest codes to learn, and Boontling, developed by people in a California town.

Three youngsters visiting their grandparents during summer use a clue to retrieve a treasure hidden on their grandfather's farm.

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.

Marigold concocts a mystery that finally gets her and her friends into the boys' private eye club.

Dog detectives Clancy and Lu must decipher a number of secret code languages and messages in order to discover where in the aquarium thieves have hidden a stolen sack of jewels.

When eleven-year-old Fish seeks to help his family financially, he reluctantly becomes a cabin boy on a pirate ship where he is asked to help decipher clues that might lead to a legendary treasure.

Introduces children to the different ways codes and ciphers have been used throughout history and includes simple puzzles for readers to solve.

When Bertie the badger visits his grandfather at a retirement home for magicians, he learns that his grandfather's rabbit, Enigma, has disappeared along with everyone's magical things, and the reader is invited to help break a code to find the items hidden throughout the book. Includes a built-in decoder.