October 25, 2009
Mysterious Messages
Whether you are a master spy or a kid with an enquiring mind, you will discover a goldmine in this history of mysterious messages. From early Greek clay tablets to modern computers, learn about code-making and code-breaking. With charts and instructions for several systems you can learn cryptography at home. A few famous still-unbroken codes are included as an extra challenge for the ambitious. Ages 9-12.
