TY  - BOOK
AU  - McDonald, C.J.
TI  - Crack the code : the history of spy codes & ciphers
SN  - 9781338321081
U1  - 652.8 MCD 
PY  - 2019///
CY  - New York
PB  - Tangerine Press
KW  - Ciphers
KW  - Juvenile literature
KW  - Cryptography
KW  - Spies
KW  - Cryptographers
N1  - 3-6
N2  - Are you able to keep a secret? And are you able to figure one out? Discover a world of codes and ciphers--of secret makers and secret breakers. You'll learn how secret messages have shaped the history of our world as you learn to send secret messages of your own using your new decoder wheel or your very own cipher! Prepare to enter the secret world of international spies, and hone your newfound skills to try to crack the most uncrackable codes!
ER  -