Puzzles entertain and challenge and exercise the brainEnjoy a mix of 100 hard standard Sudoku puzzles with solutions. Or CRUNCHY for the puzzle digestion!Solutions to each puzzle are included at the back of the bookStart at the beginning or just dip in as you feel like itWe publish 4 other levels of expertise * Soft - Mix of Easy* Lumpy - Easy Medium* Chewy - Medium Mix* Gritty - Medium Hard* Crunchy - HardTry them all today and see how you do!