Gilbert, Adrian. <br/><br/>
Codes and ciphers / 
Adrian Gilbert. 
 - Laguna Hills, CA :  QEB Pub.,  c2008. 
 - 32 p. :  ill. (some col.) ;  31 cm. 
 - Spy files .
 - Gilbert, Adrian.  Spy files. .
<br/><br/> Includes index. 
<br/><br/>Codes and ciphers -- The Caesar cipher -- Code breaking -- Morse code -- Visual codes -- Navajo code talkers -- One-time pads -- Cipher machines -- Purple intelligence -- Enigma -- Secret writing -- Microdots -- Radio communications. 
<br/><br/> Discusses the difference between codes and ciphers, examines common codes and ciphers that have been used during wars, and explains how to create simple ciphers. 
<br/><br/> 5.9  Follett Library Resources.  3-6  Follett Library Resources. 
<br/><br/><label>ISBN: </label>9781595665942 (lib. bdg.) 1595665943 
<br/><br/><label>LCCN: </label>2008010029 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ciphers--Juvenile literature.<br/>Cryptography--Juvenile literature.<br/>Ciphers.<br/>Cryptography.<br/>Ciphers.<br/>Cryptography.<br/>Ciphers.<br/>Cryptography.
<br/><br/><label>LC Class. No.: </label>Z103.3  / .G55 2008 
<br/><br/><label>Dewey Class. No.: </label>652/.8