Big Book of Sudoku: Over 500 Puzzles & Solutions, Easy to Hard Puzzles for Adults (Brain Busters)

Big Book of Sudoku: Over 500 Puzzles & Solutions, Easy to Hard Puzzles for Adults (Brain Busters)

The Big Book of Sudoku: Volume 2 (Brain Busters)

1000+ Sudoku Puzzles for Adults: A Book With More Than 1000 Sudoku Puzzles from Easy to Hard for adults.