- Sudoku Book 1,000 Puzzles, 500 Hard and 500 Extra Hard: Sudoku Puzzle Book With Two Levels of Difficulty To Improve Your Game
- Sudoku Book 400 Puzzles, 100 Easy, 100 Medium, 100 Hard and 100 Extra Hard: Sudoku Puzzle Book With Four Levels of Difficulty To Improve Your Game
- Sudoku Book 1,500 Medium Puzzles: Sudoku Puzzle Book With Only One Level of Difficulty
- Sudoku Book 400 Puzzles, 200 Easy and 200 Medium: Sudoku Puzzle Book with Two Levels of Difficulty to Improve Your Game
- Sudoku Book 800 Hard Puzzles: Sudoku Puzzle Book with Only One Level of Difficulty