Specially compiled to provide the most deadly Su Doku challenge, Ultimate Killer Su Doku 6 is the only volume for Su Doku enthusiasts who need a puzzle that rea
Just when you thought it was safe to pick up a pencil Killer Su Doku is based on the original Su Doku grid, with the same rules and numbers—1 to 9—but with
The "New York Times" crossword editor and puzzlemaster takes Sudoku to a whole new level with this collection featuring 100 brand-new (and just as addictive) pu
Killer Su Doku poses an even greater challenge than the Fiendish Su Doku puzzles.Here are 100 previously unpublished puzzles for hard-core Su Doku addicts.
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