000			01062nam a22001817a 4500
008			240517b2016 |||||||| |||| 00| 0 eng d
020			_a9780718158847
060			_aPZ
110	2		_aGCHQ
245		4	_aThe GCHQ puzzle book
260			_aLondon : _bPenguin Random House UK, _c2016
300			_axxii, 347p
520			_aGCHQ is a top secret intelligence and security agency which recruits some of the very brightest minds. Over the years their codebreakers have helped keep our country safe, from Bletchley Park breakthroughs of WW11 to the modern-day threat of cyber attack. So it comes as no surprise that, even in their time off, the staff at GCHQ love a good puzzle. Whether they are recruiting new staff or challenging each other to the toughest Christmas quizzes and treasure hunts imaginable, puzzles are at the heart of what GCHQ does. Now they are opening up their archives of decades worth of codes, puzzles and challenges for everyone to try.
650			_aQuizz book
650			_aRecreational reads
650			_aPuzzles
942			_n0
999			_c104025 _d104025