Gary L Blackwood
Author
Publisher
Dutton Children's Books
Pub. Date
c2009
Accelerated Reader
IL: MG - BL: 9.5 - AR Pts: 5
Physical Desc
170 p. : ill. ; 21 cm.
Language
English
Description
Provides an overview of various types of codes that were used throughout history to send secret messages, including those used by Spartan warriors, Elizabeth I, Navajo Code talkers, and Cold War spies.