- 5 Step Sudoku I For Addicts Vol 1: 310 Puzzles! Easy, Medium, Hard, and Unfair Levels - Sudoku Puzzle Book
- 5 Step Sudoku II For Experts Vol 3: 10 Puzzles! Easy, Medium, Hard, Unfair, and Extreme Levels - Sudoku Puzzle Book
- 5 Step Sudoku I For Experts Vol 2: 310 Puzzles! Easy, Medium, Hard, Unfair, and Extreme Levels - Sudoku Puzzle Book
- 5 Step Sudoku I For Lovers Vol 2: Special Edition - 310 Puzzles! - Easy, Medium, and Hard Levels - Sudoku Puzzle Book
- 5 Step Sudoku I For Lovers Vol 4: Special Edition - 310 Puzzles! - Easy, Medium, and Hard Levels - Sudoku Puzzle Book



















