This isn't your Grandmother's Sudoku Puzzle Book. For the more experienced Sudoku puzzler. Easy to read one puzzle per page . Easy, Medium & Hard levels randomly assorted so you never know which puzzle you will get. You decide difficulty level for yourself after the puzzle. Bringing Sudoku to a new challenging level. Suduko is for for all ages. Even Great Grandmothers. Suduko Challenge 1 in a series of 5 and continuing.