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*Featuring an introduction from Their Royal Highnesses, the Prince and Princess of Wales!* Can you think like a spy? Then we have a top secret challenge for YOU . . . For over one hundred years, GCHQ (or the Government Communications Headquarters) have wo
Test yourself with the official GCHQ Puzzle Book, the perfect gift for anyone who loves a good head-scratcher 'Fiendish . . . as frustrating, divisive and annoying as it is deeply fulfilling' Guardian ---- The secrets of the country depend on you.
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 securi