Perfectly Impossible Sudoku

Watch 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

Will Shortz has been crossword editor of The New York Times since 1993. He is also the puzzlemaster on NPR's Weekend Edition Sunday and the founder and director of the annual American Crossword Puzzle Tournament.