Daily Telegraph: Sudoku 3: Into a New Dimension

This third collection from The Telegraph has everything you have come to expect from Michael Mepham's puzzles - and more. 132 standard grids, graded according to difficulty, plus the ultimate test for hardened solvers: a sudoku in three dimensions. The step-by-step introduction includes helpful hints on how to tackle this unique challenge, as well as tips for the more familiar puzzles. `There is a monster on the loose, and it is out to eat your brain. Pitiless in its advance and cunning, Sudoku, a seemingly simple numbers game, has become the biggest puzzle craze to hit Britain since the Rubik's cube' Daily Telegraph