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School Library Journal
Reviewed on April 1, 2010
Gr 3-6 These books include the tips, tricks, and techniques of agents; the weapons and gadgets they use; and the operations of secret agencies. The first book gives an excellent overview of the historical and practical use of codes and ciphers in spy work. Coverage includes the Caesar cipher and Morse code, the use of Navaho code talkers during World War II, secret writing, the use of microd...Log In or Sign Up to Read More