Totally: Cracking Codes

Unlock the secret language of spies! Long ago, the Ancient Greeks hid secret messages in their hair. Then Mary Queen of Scots completely lost her head because of a cracked code. Today, computers create codes that no human can crack. But what are codes – and how do you make them? Discover how to decipher dots and dashes, and suss out all kinds of sneaky ciphers. Find out how codes won wars and could help us talk to aliens. And try your hand at code-making and code-breaking. Will you crack under the pressure?

Recent reviews

  • ma very informative and fun book.i had fun reading and and applying the info in my spybiz

    4 July 2011

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