Sudoku Puzzle Book for Adults: 3000 Very Hard to Extreme Hard Sudoku Puzzles with Solutions - Vol. 1 Paperback – May 21, 2020

Sudoku Puzzle Book for Adults: 3000 Very Hard to Extreme Hard Sudoku Puzzles with Solutions - Vol. 1

Hard Sudoku puzzle books vol. 1: Hard, Very Hard and Extremely Hard Sudoku - Total 300 Sudoku puzzles to solve - Includes solutions (Hard to extreme)

2000 Hard to Extreme Sudoku Puzzles for Adults: Expert, Master Level Big Book of Sudoku for Fun and a Great Brain Workout to Keep Your Mind Active (Classic Sudoku Puzzle Books for Adults)