A must for any budding code-breakers who are taking on the Operation Bletchley challenge.
Published in association with the Turing Trust, this challenging collection of over 120 brain training puzzles will put your problem-solving skills to the test.
Follow in the footsteps of famous World War II codebreaker Alan Turing who used impeccable logic to decipher the military codes used by Germany and its allies. These expert puzzles offer a tough but enjoyable challenge, with puzzles of many varied types.
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