- Jigsaw Sudoku 400+ Easy Puzzles Volume 4: Bored of regular Sudoku? Try your hand at Jigsaw Sudoku
- Jigsaw Sudoku 400+ Hard Puzzles Volume 5: Bored of regular Sudoku? Try your hand at Jigsaw Sudoku
- Jigsaw Sudoku 400+ Medium Puzzles Volume 1: Bored of regular Sudoku? Try your hand at Jigsaw Sudoku
- Variety Sudoku Puzzle Book 400+ Hard Puzzles Volume 1: 400+ Hard Sudoku Puzzles for Adults
- Jigsaw Sudoku 400+ Medium Puzzles Volume 4: Bored of regular Sudoku? Try your hand at Jigsaw Sudoku