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

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

Richard Belfield

281 pages • first pub 2006 (view editions)

nonfiction history mathematics technology dark informative medium-paced
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6 FASCINATING STORIES, 6 MYSTERIOUS CODESFollow the horrific crimes of the ZODIAC and see the symbol-filled letters he sent to local San Francisco newspapers. Could breaking his code lead to the arrest of this still-at-large serial killer?Learn ho...

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