Download or read book Spy Codes and Ciphers written by Susan K. Mitchell and published by Enslow Publishing, LLC. This book was released on 2012-01-01 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: "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"--