Vol: Sudoku Puzzle Book 200 Easy, Medium, Hard & Insane Puzzles (Paperback) - Walmart.com
Sudoku 12 x 12 Level 5: Very Hard Vol. 12: Play Sudoku 12x12 Twelve Grid With Solutions Hard Level Volumes 1-40 Sudoku Cross Sums Variation Tr (Paperback) | Snowbound Books
Sudoku Puzzles - Vol. D: Easy to Read, Large Grid Sudoku Puzzles: Lewett, Kurt: 9781482336559: Amazon.com: Books