"A hands-on guide to introduce kids to the fascinating world of secret codes and ciphers, Code Cracking For Kids explores many aspects of cryptology, including famous people who used and invented codes and ciphers, such as Julius Caesar and Thomas Jefferson; codes used during wars, including the Enigma machine, whose cracking helped the Allies gather critical information on German intelligence in World War II; and work currently being done by the US government, such as in the National Security Agency"-- Provided by publisher.

1. What is cryptology? -- 2. Codes and ciphers take their place in history -- 3. Colonies united -- 4. States divided -- 5. The World goes to war -- 6. breaking the unbreakable -- 7. Hidden---right before your eyes...and ears -- 8. No answers in sight -- 9. Codes and ciphers in a changing world -- 10. Be a code and cipher champ.