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Will Shortz Presents Difficult Sudoku: 200 Hard Puzzles
Will Shortz Presents Difficult Sudoku 200 Hard Puzzles Author:Will Shortz Are you tough enough? Take on this collection of 200 difficult sudoku puzzles and find out! Includes: -200 hard puzzles-Perfect portable size-Edited by Will Shortz Also in the series: -Will Shortz Presents Daring Sudoku -Will Shortz Presents Dangerous Sudoku