The GCHQ Puzzle Book II #foliosociety The Ordnance Survey Puzzle Book

The Ordnance Survey Puzzle Book was 2018's bestselling Christmas gift book so why not brush up on your map reading skills and crack an array of fiendish puzzles all whilst learning amazing facts so YOU can become the ultimate map-reader

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The GCHQ Puzzle Book II #foliosociety The Ordnance Survey Puzzle BookSTEP ASIDE MURDLE BECAUSE GCHQ ARE BACK WITH EVEN MORE BRAIN BENDING PUZZLES TO PUT YOUR WITS TO THE TEST Now a pocket sized paperback, The GCHQ Puzzle Book II is the ideal present for armchair code breakers and amateur cryptographers alike. Fiendish, frustrating, annoying, fulfilling Guardian The spooks at GCHQ need your help again. Can you break these fiendish codes and prove youre a master puzzler? The defence of the realm depends on GCHQ. And