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  • The GCHQ Puzzle Book by GCHQ
    The GCHQ Puzzle Book (English, Paperback) GCHQ

    GCHQ is a top-secret intelligence and security agency which recruits some of the very brightest minds. Over the years, their codebreakers have helped keep England safe, from the Bletchley Park breakthroughs of WWII to the modern-day threat of cyberattack. So it comes as no surprise that, even in their time off, the staff at GCHQ love a good puzzle. Whether they're recruiting new staff or...

    $14.29 $19.95
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  • The GCHQ Puzzle Book II by GCHQ
    The GCHQ Puzzle Book II (English, Paperback) GCHQ

    Challenge yourself with the GCHQ team's long-awaited second puzzle book - full of both harder and easier brain teasers. ...

    $15.24 $16.48
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