I Can't Keep Calm It's Hard Sudoku!: 300 VERY DIFFICULT Sudoku Puzzles (en Inglés)

Reseña del libro

Are you a Sudoku WARRIOR? Well it's time for another Sudoku CHALLENGE. Can you handle it? This collection of 300 hundred challenging puzzles will have you coming back for more!Features: - 300 hard sudoku puzzles- Answers include