100 Extremely Difficult and Challenging Sudoku Puzzles Expertly Created for Serious Sudoku Fans
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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
Excerpt:
