- Medium Sudoku X Puzzle Book for Adults: 250 Medium Sudoku For Intermediate Players
- Binary puzzle books for Adults: 400 Easy to Medium Puzzles 9x9
- Sudoku Collection: 200 Hard Sudoku Puzzles 16x16
- Jigsaw Sudoku Puzzle Book for Adults: 200 Medium Puzzles 9x9
- Very Hard Sudoku X Puzzle Book for Adults: 250 Very Hard Sudoku For Advanced Players





























