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Terrifying Sudoku: The Hardest Puzzles (Will Shortz Presents...)
Terrifying Sudoku The Hardest Puzzles - Will Shortz Presents... Author:Will Shortz This volume features 200 of the most devious puzzles ever created! Features:
· 200 mind-melting puzzles!
· Edited by legendary New York Times crossword editor Will Shortz
· Portable and affordable package