Sudoku Futoshiki - 200 Easy to Normal Puzzles 8x8 (Volume 26)
Sudoku Hidoku - 200 Hard to Master Puzzles 12x12 (Volume 37)
Sudoku Jigsaw - 200 Hard to Master Puzzles 8x8 (Volume 23)
Sudoku Numbricks - 200 Hard to Master Puzzles 10x10 (Volume 47)
Sudoku X - 200 Master Puzzles 6x6 (Volume 16)
Consecutive Sudoku - 200 Easy Puzzles 6x6 (Volume 9)
Christmas Sudoku For Kids: Easy Sudoku Puzzles - Christmas Edition