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“daniel oros”

Showing 1 - 3 of 3 results for “daniel oros”
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  • The Callous Hand

    Decoding the Zodiac Killer

    by Daniel Oros ...
    For fifty-six years, no one knew who the Zodiac Killer was. He killed at least five people in Northern California between 1968 and 1969. He sent encrypted messages to newspapers and taunted investigators with ciphers they could not crack. The FBI examined his codes. The NSA examined them. Cryptographers around the world attacked them. The case was never solved. Then someone went back to the ... Read more

    $13.99 CAD

  • A Grammar of Persons

    Decoding the Zodiac Killer

    by Daniel Oros ...
    The Z340 cipher sat unsolved for fifty years. The Z13 cipher — thirteen symbols, sent to the San Francisco Chronicle in 1969 — was supposed to spell the Zodiac Killer’s name. No one could read it.Zekiel could.A Grammar of Persons: Decoding the Zodiac Killer follows a researcher who spends seven years applying three independent methodologies — cipher analysis, comparative letterography, and ... Read more

    $14.04 CAD

  • Crackproof No Longer

    A Grammar on Ciphers

    by Daniel Oros ...
    The narrator of this novel is a Fellow of the American Academy of Actuaries with a doctorate in mathematical statistics. He built the Zodiac Killer’s most famous unsolved cipher — the Z340 — in 1969, and he has waited fifty years for someone to read it correctly.He won't wait any longer.Crackproof No Longer is a first-person confession by a narrator who may or may not be the Zodiac Killer, written ... Read more

    $14.05 CAD