12 books
500+ Sudoku Puzzles Easy To Hard
500+ Puzzles Big Book of Sudoku Easy-Medium-Hard For Kids
500+ Puzzles Big Book of Sudoku Easy To Hard For Kids
600 Sudoku Puzzle Book for Kids Sudoku Easy-Medium-Hard
600+ Sudoku Puzzle Book for Kids Easy-Medium-Hard
Sudoku Puzzles Book Easy to Hard 600 PUZZLES
The Super Sudoku Book For Smart Kids
The Ultimate Puzzle Book for Kids
The Super Sudoku Book For Smart Kids 600 Puzzles
The Jungle Sudoku Puzzle Book Easy - Medium - Hard
600 Sudoku Puzzles Easy to Hard
Sudoku Puzzles for Adults Easy to Hard