Will Shortz Presents Ferocious Sudoku: 200 Hard Puzzles
Macmillan, 2008 - Games & Activities - 320 pages
Are you tough enough? Take on this collection of 200 devilishly difficult sudoku puzzles!
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PerfectUser Review - freddymac - Overstock.com
Difficult yet not impossible puzzles. The book has large squares to insert all the candidates and yet the book itself is small enough to carry in my purse. Too bad it wasnt spiral bound! Read full review