1000+ Sudoku Puzzles for Adults: A Book With More Than 1000 Sudoku Puzzles from Easy to Hard for adults.
Independently published
BIG Sudoku Puzzles Book for Adults (Eye-Friendly Extra Large Print): Easy to Hard Book for Seniors & Teens With Solution
1000+ Sudoku Puzzles for Adults: Medium to Hard Sudoku Puzzles with Detailed Step-by-step Solutions and Hints When You Get Stuck
1000+ Sudoku Puzzles for Adults: Easy to Hard Puzzles for Adults with Solutions | Sudoku Book with 5 Difficulty Levels | Beginner - Easy - Normal - Hard – Extreme
Society of One Heaven