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The ultimate collection of over 1,000 handcrafted sudoku puzzles, in a range of difficulties, handcrafted by the masters at Nikoli in Japan (whose Workman ...
A CUNNING CHRONICLE OF THE 50 CODES THAT ALTERED THE COURSE OF HISTORY AND CHANGED THE WORLD
From the bestselling author of Bletchley Park Brainteasers ...
Test your wits against 210 brand-new killer sudokus with this formidable collection of the world's favourite puzzle.
This compilation draws on all the knowledge ...
Flex your mental muscles with this bumper collection of 200 cryptic crosswords!
A true test of lateral thinking, these fiendish crosswords are the perfect way ...
Challenge yourself at home with word and number puzzles
100 quick cryptic puzzles from The Times adapting the cryptic puzzle for those with a hectic ...
A mixture of old and new riddles covering a variety of mathematical topics: money, speed, plane and solid geometry, probability, topology, tricky puzzles, and more ...
Test yourself against a fiendishly tricky series of IQ test-style puzzles, the perfect training for those who want to prepare for a Mensa IQ test ...
Prove your logical and arithmetical prowess by solving the exceptionally tricky problems in Mensa's Most Difficult Number Puzzles.
This full-colour book features a huge ...