Spy Codes and Ciphers

by Susan K. Mitchell

Book Overview

Can flashing lights send out a secret message? Did a famous spy use sketches of butterflies to hide messages? Can a digital photo hide a secret code? For centuries, spies have used many different ways to pass secret information. Codes and ciphers keep information safe from the enemy. Author Susan K. Mitchell uncovers the secrets to the amazing world of spy codes and ciphers.

• Format: Library Binding
• Language: English
• ISBN: 0766037096
• ISBN13: 9780766037090
• Release Date: January 2012
• Publisher: Enslow Publishing
• Length: 48 Pages
• Weight: 0.65 lbs.
• Dimensions: 0.5" x 7.8" x 9.1"
• Age Range: 9 to 15 years
• Grade Range: Grades 4 to 10