Super Samurai Sudoku: Super Samurai Sudoku 3 : 13-Grid Sudoku Puzzles (Paperback) - Walmart.com
Four sudoku puzzles of comfortable (easy, yet not very easy) level, on A4 or Letter sized page with margins, suitable for large print books. Set 13 Stock Vector Image & Art - Alamy
Sudoku solution: 10/13/11 | The Baylor Lariat
Killer Sudoku Puzzles - 200 Easy to Medium 6x6 vol. 13 (Paperback) | Books and Crannies