Enjoy 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 book Start at the beginning or just dip in as you feel like it We publish 4 other levels of expertise -Soft - Mix of Easy -Lumpy - Easy Medium -Chewy - Medium Mix -Gritty - Medium Hard -Crunchy - Hard Puzzles entertain and challenge and exercise the brain. Try them all today and see how you do!