Anti Diagonal Sudoku - 200 Easy to Normal Puzzles 9x9 (Volume 6)
Even-Odd Sudoku - 200 Easy to Master Puzzles 9x9 (Volume 1)
Sudoku Easy as ABC - 200 Master Puzzles 6x6 (Volume 13)
Sudoku Jigsaw - 200 Hard to Master Puzzles 9x9 (Volume 16)
Frame Sudoku - 200 Normal Puzzles 9x9 (Volume 3)
Volume 1
