The book prepared and released by gchq is not one for the light hearted if you like the sun crossword puzzle then dont bother but if you like complex puzzles which are going to totally absorb you then this is a great addition to anyones collection. News article 15 oct 2016 published by penguin on 20 october 2016 the gchq puzzle book features over 140 pages of codes puzzles and challenges created by gchqs expert code breakers in their spare time. The gchq puzzle book kindle edition by gchq download it once and read it on your kindle device pc phones or tablets use features like bookmarks note taking and highlighting while reading the gchq puzzle book. It was a tease for an announcement on friday of a new gchq puzzle book the first one in 2016 proved a surprise hit selling more than 300000 copies the gchq puzzle book ii to be published by . Gchq the uk listening and code breaking agency tweeted a cryptic message made of emoji this week the message for those who could crack it was an announcement of a new puzzle book the emoji
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