00963nam a22002657a 45000010005000000030006000050050017000110080041000280200018000690400029000870500013001160820010001291000020001392450079001592500046002382600037002843000044003215050008003655200195003735210021005685210020005896500030006096500027006397000031006665266FISKH20241121153601.0241121b        cb ||||| |||| 00| 0 eng d  a9780545290081  aFISKHbengcFISKHdFISKH  aZ103.B53  a652.8  aBlackwood, Gary  aMysterious Messages :bA History of Codes and Ciphers /cby Gary Blackwood  aFirst Scholastic printing, September 2010  aNew York : bScholastic ;c2009.  a170 pages : billustrations ;c19 cm .   aZ 
  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.8 a1150 
bLexile 
8 aZ 
bRaz-Plus 
  acryptographyvnon-fiction  aespionagevnon-fiction  aHenry, Jasondillustrator