Don't think too hard or you'll never solve these logic puzzles and riddles. The answers to all 187 are easy once you catch the tricky wording. How can you tie a

Discover the adventure and excitement of mathematical puzzles. Match your wits with the human computer. Sharpen your intellect, delight your friends and enjoy h

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

Get your brain working with 200 grid-based logic puzzles from the Puzzle Baron! Filled with complex and fun brain teasers that range in difficulty, this book wi

** 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