by Eric Johnston (Author)

- 300 of Sudoku puzzles Medium to hard level. You can be challenged no matter your skill level
- Wide center margins making it easier to work on the puzzles when you open or fold the book
- Bigger font and good quality paper - easy to read and write
- Big grids 4 problems per page
- Includes full solutions for every puzzle at the end of the book
- Sudoku performs the ultimate exercise to your brain
- The good companion for vacation and traveling