Masaki Hoshiko

Unbelievably Hard Sudokus Collection for Sudoku Expert #11

Unbelievably Hard Sudokus Collection for Sudoku Expert #19

Senior Sudokus Book #23

Unbelievably Hard Sudokus Collection for Sudoku Expert #17

Senior Sudokus Book #25

The Art Of Sudokus #5

Senior Sudokus Book #2

Senior Sudokus Book #11

Senior Sudokus Book #3

Senior Sudokus Book #15

Senior Sudokus Book #16

Unbelievably Hard Sudokus Collection for Sudoku Expert #12

Unbelievably Hard Sudokus Collection for Sudoku Expert #24

Intensely Hard Sudokus for Sudoku Pros #13

Intensely Hard Sudokus for Sudoku Pros #22

The Art Of Sudokus #3

The Big Sudokus Book for Beginners #3

Intensely Hard Sudokus for Sudoku Pros #1

Intensely Hard Sudokus for Sudoku Pros #11

Senior Sudokus Book #9

Unbelievably Hard Sudokus Collection for Sudoku Expert #13

Unbelievably Hard Sudokus Collection for Sudoku Expert #18

The Art Of Sudokus #17

Unbelievably Hard Sudokus Collection for Sudoku Expert #1