The Six Unsolved Ciphers: Inside the Mysterious Codes That Have Confounded the World's Greatest Cryptographers

by Richard Belfield

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  • ISBN10 1569756287
  • ISBN13 9781569756287
  • Publish Date 28 August 2007
  • Publish Status Out of Print
  • Out of Print 16 March 2021
  • Publish Country US
  • Imprint Amorata Press
  • Format Paperback
  • Pages 312
  • Language English