Barnes and Noble
Big Book Sudoku -Very Hard- 250 Logical Puzzle + Bonus 250 Classic Killer Sudoku: 50 Patchwork Doku 12 X 12 + 50 Kenkendoku 9 X 9 + 50 Hidoku-Doku 12 X 12 + 50 Numbricks 12 X 12 + 50 Brickwalldoku 9 X 9 - Large Print + Solutions + Examples + Bonus 250 Cla
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