Published in association with The Turing Trust, this incredible collection of puzzles allows you to put your codebreaking skills to the test - if you can solve

NATIONAL BESTSELLER • Considering a trip to a quaint English village? You’ll think twice after learning about the countless murderous possibilities lurking

December, 1932 In the bathroom of a Belgian hotel, a French spymaster photographs top-secret documents – the operating instructions of the cipher machine, Eni

** WINNER OF 'STOCKING FILLER OF THE YEAR AWARD' GUARDIAN ** Pit your wits against the people who cracked Enigma in the official puzzle book from Britain's secr