GCHQ publishes book of spies' brainteasers for children | GCHQ | The Guardian
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NCSC UK on Twitter: "Our challenge to you this #WorldBookDay... How fast can you complete puzzle 221 on page 134 of the @GCHQ Puzzle Book II? Our best time will obviously be
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![The GCHQ Puzzle Book [Review] – Lock Me If You Can](https://lockmeifyoucan.files.wordpress.com/2017/01/img_9312.jpg "The GCHQ Puzzle Book [Review] – Lock Me If You Can")
The GCHQ Puzzle Book [Review] – Lock Me If You Can
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GCHQ Puzzle Books help to raise £500,000 for mental health... - GCHQ.GOV.UK
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The GCHQ Puzzle Book [Review] – Lock Me If You Can
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GCHQ donates £240,000 to Heads Together from puzzle book... - GCHQ.GOV.UK
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William and Kate welcome GCHQ puzzle book for children | indy100
Think you're a code-breaker? Try these GCHQ puzzles | ITV News
