This brilliant and challenging collection of number and mathematical puzzles forms part of a series of books produced in association with the Bletchley Park Tru

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

WOULD BLETCHLEY PARK--THE TOP-SECRET HOME OF BRITISH WORLD WAR II CODEBREAKERS--HAVE RECRUITED YOU? PUT YOUR MENTAL AGILITY TO THE TEST WITH THESE FIENDISHLY CH

Sharpen your brain with this collection of 101 quick-fire puzzles, produced by the Bletchley Park Trust. Bletchley Park was the British codebreaking HQ during W