Sudoku fever has officially stormed the nation. These fiendishly popular number puzzles have a universal appeal - no maths ability is needed, it's just a satisfying logical puzzle. Once you've done one, you will be hooked. "The Daily Mail" is Britain's biggest-selling quality paper, with a circulation of around 2.2 million. Their Sudokus have drawn hundreds of thousands of fans, and these bumper books will be among the biggest yet with 150 puzzles each. It is suitable for beginners and Sudoku champions alike.