The GCHQ Puzzle Book II
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STEP 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
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The spooks at GCHQ need your help again.
Can you break these fiendish codes and prove you’re a master puzzler?
The defence of the realm depends on GCHQ. And these fiendish puzzles and tests are how th...






















