Will Shortz Presents Hard Sudoku Volume 1: 200 Challenging Puzzles
Will Shortz
St. Martin's Griffin
2018
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The first in a new series: hard puzzles for serious sudoku solvers. Do you have what it takes? These 200 challenging sudoku puzzles from Will Shortz will keep your mind sharp Features: - 200 hard puzzles - Big grids for easy solving - Introduction by legendary Puzzlemaster Will Shortz