- Pocket Sudoku 150+ Puzzles: Medium Level with Solutions - Vol. 18
- Pocket Sudoku 150+ Puzzles: Medium Level with Solutions - Vol. 16
- Pocket Sudoku 150+ Puzzles: Medium Level with Solutions - Vol. 10
- Pocket Sudoku 150+ Puzzles: Very Easy Level with Solutions - Vol. 8
- Pocket Sudoku 150+ Puzzles: Easy Level with Solutions - Vol. 8




























