2,208 books • 130 series
Calcudoku Plus Puzzle Books - 400 Easy to Master Puzzles 7x7 (Volume 3) (Calcudoku Plus Puzzle Books, #3)
Suguru Puzzle Books - 400 Easy to Master Puzzles 9x9 (Volume 5) (Suguru Puzzle Books, #5)
Skyscrapers Puzzle Books - 400 Easy to Master Puzzles 7x7 (Volume 2) (Skyscrapers Puzzle Books, #2)
Classic Sudoku Puzzle Books - 400 Easy to Master Puzzles 12x12 (Volume 5) (Classic Sudoku Puzzle Books, #5)