"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"--Provided by publisher.
- ISBN10 0766037096
- ISBN13 9780766037090
- Publish Date 16 January 2012
- Publish Status Active
- Publish Country US
- Imprint Enslow Publishing
- Format Hardcover (Library Binding)
- Pages 48
- Language English