A unique book of puzzles from British intelligence organisation GCHQ.
GCHQ (Government Communications Headquarters) is a signals intelligence and cyber security organisation whose mission is to keep Britain safe from terror attacks and cybercrime.
A fiendish work, as frustrating, divisive and annoying as it is
deeply fulfilling: the true spirit of Christmas
*Guardian*
Surely the trickiest puzzle book in years. Crack these fiendish
problems and Trivial Pursuit should be a doddle
*Daily Telegraph*
Ideal for the crossword enthusiast
*Daily Telegraph*
An explosion of a puzzle collection, too, with hundreds of
questions and loads of peripheral material, including captioned
photographs and history of twentieth-century British encryption,
featuring the work of Alan Turing
*The Times Literary Supplement*
This isn't your grandfather's Sudoku book. Rather, it's a puzzle
compendium put together by the organisation that made the Bletchley
Park breakthroughs - quizzes, bewilderments and brainteasers to
challenge even the sharpest of minds
*The Gentleman's Journal*
WINNER OF STOCKING FILLER OF THE YEAR AWARD
*THE GUARDIAN*
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