Test your powers of logic with these fun Su Doku puzzles. The eleventh instalment of the bestselling Times Su Doku series. Su Doku is the biggest craze to hit The Times since the first crossword was published in 1930. From obscure origins, the wordless puzzle is now the hottest challenge to readers of The Times and has generated huge interest. The Times Su Doku Book 10 contains 150 mind-bending variations ranging from mercifully Mild to the uber-challenging Super fiendish: 10 Mild puzzles60 Difficult puzzles50 Fiendish puzzles30 Super fiendish The Times continue to offer superior Su Doku puzzles from their suppliers, Puzzler Media Syndication, that will put your logic to the ultimate test. The Times continue to offer superior Su Doku puzzles from their suppliers, Sudoku Syndication, that will put your logic to the ultimate test.