Masaki Hoshiko

Extra Hard Sudokus Puzzle Book #1

Extra Hard Sudokus Puzzle Book #4

Advanced Sudokus Collection #5

Advanced Sudokus Collection #4

Advanced Sudokus Collection #1

Advanced Sudokus Collection #3

Advanced Sudokus Collection #2

The Big Sudokus Book for Beginners #4

Intensely Hard Sudokus for Sudoku Pros #10

Intensely Hard Sudokus for Sudoku Pros #15

Senior Sudokus Book #24

Intensely Hard Sudokus for Sudoku Pros #23

Intensely Hard Sudokus for Sudoku Pros #21

Senior Sudokus Book #17

Intensely Hard Sudokus for Sudoku Pros #17

Intensely Hard Sudokus for Sudoku Pros #12

The Art Of Sudokus #4

The Art Of Sudokus #10

Unbelievably Hard Sudokus Collection for Sudoku Expert #14

Intensely Hard Sudokus for Sudoku Pros #2

Intensely Hard Sudokus for Sudoku Pros #16

Senior Sudokus Book #12

The Art Of Sudokus #23

The Art Of Sudokus #15