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The GCHQ Puzzle Book II: Solve more than 100 brilliant brainteasers
By GCHQ
eBook
$16.53
By GCHQ
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Train your brain with these fiendishly difficult puzzles, the perfect companion for anyone wanting to keep their mind busy
'Fiendishly tricky' Daily Mail
With their first bestselling book, The GCHQ Puzzle Book, the UK's intelligence and security experts tested us with puzzles, codes and real-life entrance tests from their archives.
Now, they are back with a NEW collection of head-scratching, mind-boggling and brain-bending puzzles that will leave you pondering for hours.
For those who often fou...