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This collection of 140 intriguing and challenging codebreaking puzzles are produced in association with the Bletchley Park Trust. Follow in the footsteps of Wor

This collection of challenging logic puzzles is part of a series of books produced by the Bletchley Park Trust. Follow in the footsteps of the Codebreakers and

Follow in the footsteps of the Codebreakers and establish whether you have the puzzle solving skills needed to have worked at wartime Bletchley Park. This colle

** 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

"As gripping as a good thriller." --The Washington Post Unpack the science of secrecy and discover the methods behind cryptography--the encoding and decoding of