150 mind-bending variations that range from mercifully mild to the uber-challenging super fiendish The 14th installment of the Times Su Doku series will feed puzzlers' desire for yet more Su Doku puzzles. Su Doku is the biggest craze to hit the Times since the first crossword was published in 1930. From obscure origins, the wordless puzzle has generated huge interest. This collection contains 10 Mild puzzles, 60 Difficult puzzles, 50 Fiendish puzzles, and 30 Super fiendish, to put your logic to the ultimate test.

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