Published in association with The Turing Trust, this incredible collection of puzzles allows you to test your own codebreaking skills - if you can solve every puzzle in the book you might once have been recruited to join the ranks of Alan Turing's codebreakers! It contains a breathtaking range of different types of puzzles, and so presents a wonderfully entertaining challenge for any puzzle lover.

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Dr Gareth Moore is the author of a wide range of brain-training and puzzle books for both children and adults. He is the creator of online brain training site www.BrainedUp.com and runs the daily puzzle website www.PuzzleMix.com. He gained his Ph.D from Cambridge University in the field of Machine Learning, and has contributed to various advanced projects for leading technology companies.

Dermot Turing graduated from King's College Cambridge and New College Oxford. He spent his career in the legal profession, most recently as a partner of Clifford Chance. Since 2014 he has moved into a more varied range of activities, including an active role as a trustee of Bletchley Park. Dermot Turing is the nephew of Alan Turing and author of Prof: Alan Turing Decoded (2015) and the well-received X,Y and Z: The Real Story of How Enigma Was Broken (2018).

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