- Sudoku Puzzle Book: Hard Sudoku Puzzle Book including Instructions and answer keys - Sudoku Puzzle Book for Adults
- Sudoku Puzzle Book: Medium Sudoku Puzzle Book including Instructions and answer keys - Sudoku Puzzle Book for Adults
- Sudoku Puzzle Book: Easy Sudoku Puzzle Book including Instructions and answer keys - Sudoku Puzzle Book for Adults
- Sudoku Puzzle Book: Medium Sudoku Puzzle Book including Instructions and answer keys - Sudoku Puzzle Book for Adults
- Sudoku Puzzle Book: Easy Sudoku Puzzle Book including Instructions and answer keys - Sudoku Puzzle Book for Adults