34 books • 2 series
Book #1: Sudoku 300 Easy Puzzles. Solutions Included
Book #2: Sudoku 300 Medium Puzzles. Solutions Included
Book #4: Sudoku 300 Extra Hard Puzzles. Solutions Included
Book #5: Sudoku 500 Easy Puzzles. Solutions Included
Book #11: Sudoku 1,000 Hard Puzzles. Solutions Included
