2,208 books • 130 series
Small Chain Sudoku - 200 Easy to Master Puzzles 5x5 (Volume 29) (Small Chain Sudoku, #29)
Slitherlink Puzzle Books - 400 Easy to Master Puzzles 10x10 (Volume 6) (Slitherlink Puzzle Books, #6)
Small Chain Sudoku - 200 Easy to Normal Puzzles 5x5 (Volume 30) (Small Chain Sudoku, #30)