Will Shortz Presents Perfectly Impossible Sudoku: 200 Very Hard Puzzles Highlights_SEP_30 A Dozen a Day Preparatory

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Will Shortz Presents Perfectly Impossible Sudoku: 200 Very Hard Puzzles Highlights_SEP_30 A Dozen a Day PreparatoryWatch out! These puzzles are mind melting! But if you dare, grab a pen and take on these two hundred all new extra challenging puzzles. Features: 200 hard puzzles Big grids for easy solving Introduction by legendary puzzlemaster Will Shortz