Title rated 3.75 out of 5 stars, based on 10 ratings(10 ratings)
Book, 2012
Current format, Book, 2012, , Available .
Book, 2012
Current format, Book, 2012, , Available . Offered in 0 more formats
"Discusses different methods of secret communications used by spies, such as Morse code, the Enigma machine, the Najavo language, and digital steganography, and includes career information"--
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