Test your powers of logic with these fun Su Doku puzzles.

With the massive appetite for Su Doku puzzles seemingly insatiable, The Times brings you another offering to satisfy those cravings.

With enough puzzles to satisfy even the most avid Su Doku addict, The Times Su Doku Book 7 contains 150 mind-bending variations of the devilish number grid, including:

40 Mild puzzles 50 Difficult puzzles 50 Fiendish puzzles 10 Super fiendish

With their new puzzle suppliers, market-leaders The Times continue to offer the best Su Doku puzzles. Four levels of difficulty put your logic to the ultimate test.