197 books • 39 series
101 Easy Sudoku Puzzles for Busy Women (Sudoku for Busy Women, #1)
101 Easy Sudoku Puzzles for Busy Moms (Sudoku for Busy Moms, #1)
101 Easy Sudoku Puzzles for BFFs (Sudoku for Bffs, #1)
101 Easy Sudoku Puzzles for High School Students (Sudoku for High School Students, #1)
101 Easy Sudoku Puzzles for You (Sudoku for You, #1)