TY  - BOOK
AU  - Blackwood, Gary
AU  - Henry, Jason
TI  - Mysterious Messages: A History of Codes and Ciphers 
SN  - 9780545290081
AV  - Z103.B53 
U1  - 652.8 
PY  - 2009///
CY  - New York : 
PB  - Scholastic
KW  - cryptography
KW  - non-fiction
KW  - espionage
N1  - Z
; 1150
; Lexile
; Z
; Raz-Plus

N2  - From the ingenious ciphers of Italian princes to the spy books of the Civil War to the advanced techniques of the CIA, codes and code breaking have played important roles throughout history
ER  -