The Super Sudoku Book For Smart Kids: A Collection Of Over 200 Sudoku Puzzles Including 4×4′s, 6×6′s, 8×8′s, and 9×9′s That Range In Difficulty From Easy To Hard! $4.12

Amazon has The Super Sudoku Book For Smart Kids: A Collection Of Over 200 Sudoku Puzzles Including 4×4′s, 6×6′s, 8×8′s, and 9×9′s That Range In Difficulty From Easy To Hard! on sale for $4.12. Shipping is free w/ Prime or on orders of $25 or more.