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020 _a9780545290081
040 _aFISKH
_beng
_cFISKH
_dFISKH
050 _aZ103.B53
082 _a652.8
100 _aBlackwood, Gary
245 _aMysterious Messages :
_bA History of Codes and Ciphers /
_cby Gary Blackwood
250 _aFirst Scholastic printing, September 2010
260 _aNew York :
_bScholastic ;
_c2009.
300 _a170 pages :
_billustrations ;
_c19 cm .
505 _aZ
520 _aFrom 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.
521 8 _a1150
_bLexile
521 8 _aZ
_bRaz-Plus
650 _acryptography
_vnon-fiction
650 _aespionage
_vnon-fiction
700 _aHenry, Jason
_dillustrator
942 _2ddc
_cBK
_n0
999 _c5266
_d5266