- Brainy Bilby Sudoku Volume 19: Medium Level Puzzles for Adults and Teens
- Brainy Bilby Sudoku Volume 18: Medium Level Puzzles for Adults and Teens
- Brainy Bilby Sudoku Volume 24: Medium Level Puzzles for Adults and Teens
- Brainy Bilby Sudoku Volume 15: Medium Level Puzzles for Adults and Teens
- Brainy Bilby Sudoku Volume 12: Medium Level Puzzles for Adults and Teens


















