Masaki Hoshiko
No reliable biographical information is available for Masaki Hoshiko. The author's background and works are not widely documented.
EXCEEDINGLY HARD SUDOKU PUZZLE BOOK: 300 Insane Puzzles That Are More Difficult To Solve Than Einstein's Equations And For People Who Have IQ Above 180
The Book For Sudoku Pros: Greatest Sudoku Collection With 300 Hard Sudoku Puzzles That Challenges Your Brain In Minutes
Extremely Hard Sudoku Puzzle Book: 300 Challenging Puzzles That Are Ready To Destroy Your Pencils And Brain Cells Without Talking To Your Spouse
Hard Tests For Your Brain: 300 Sudoku Puzzles In A Single Book That Will Help You Kill Time And Enjoy Your Evenings (Becoming The Master Sudoku Solver)
F*CKING HARD SUDOKU PUZZLE BOOK #17: The 300 Worst Sudoku Puzzles in History That Will Destroy Your Life And Brain Cells Just At The First Puzzle
The Big Book Of Difficult Sudoku: The Book Of Hard Sudoku Puzzles For Teenagers And College Students (Learn How To Improve Your Cognitive Abilities And Memory In A Few Minutes A Day)
TERRIBLY HARD SUDOKU PUZZLE BOOK: 300 Puzzles That Are So Difficult That You Never Got Past The First And Yo Mama Had To Use It As Toilet Paper
Hard Sudoku Book For Seniors: The Ultimate Large Print Sudoku Book Made For Seniors And People With Looking For A Challenge (Helps Improve Brain Functions And Keeps Your Mind Engaged)