Additional information
by Puzzlestoria (Author)
Insane Sudoku A great collection of the toughest Sudoku puzzles for the experienced Sudoku fan. Get ready to experience hours of brain training!
- 100 new 9x9 insane level Sudoku puzzles
- Less than 25 pre-filled numbers per puzzle
- Quality paper and premium matte cover
- Large Print edition with plenty of space to work with
- Solutions key at the back pages