- Sudoku Puzzle Books for Adults: Easy puzzles for brain train | 40 Puzzles and Solutions to Challenge your brain!
- Sudoku Puzzle Book for Adults: Hard 400 puzzles for brain train | 400 Puzzles and Solutions to Challenge your brain!
- Sudoku Puzzle Books for Adults: Easy puzzles for brain train | 40 Puzzles and Solutions to Challenge your brain!
- Sudoku Puzzle Books for Adults: Easy puzzles for brain train - 40 Puzzles and Solutions to Challenge your brain!
- Sudoku Puzzle Books for Adults: Easy puzzles for brain train - 40 Puzzles and Solutions to Challenge your brain!