ciphers

The author discusses his investigation into the findings of Israeli mathematician, Eli Rips, who has discovered a code in the original Hebrew version of the Old Testament that seems to foretell events that have happened, and may still occur, thousands of years after the Bible was written.

Discusses secret writing, ciphers, and the processes of creating and deciphering secret or difficult languages. Includes thinking and writing exercises.

Presents various methods of writing, speaking, and signaling secret messages.

Introduces the making of all kinds of codes -- Morse code, bar codes, map codes, flag codes, and famous secret codes, explaining how these codes are used to communicate.

Discusses the history and different varieties of codes and ciphers, describing code machines, signals, sign language, picture languages, and hidden messages.

Eleven-year-old Fish, seeking a way to help his family financially, becomes a reluctant cabin boy on a pirate ship, where he soon makes friends--and enemies--and is asked to help decipher clues that might lead to a legendary treasure.

Steve'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.

When a new book arrives at the library with a secret code written inside, Derek, with the help of his friends, follows the clues from one novel to the next and makes a discovery that may help him get past a terrible loss.