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New York Post Difficult Sudoku: The Official Utterly Adictive Number-Placing Puzzle (New York Post Su Doku)
New York Post Difficult Sudoku The Official Utterly Adictive NumberPlacing Puzzle - New York Post Su Doku Author:Wayne Gould
200 New Difficult Puzzles -- They Are Not Going to Be Easy But You Are Ready
Su Doku, "the crossword without words," comes with a warning: it is seriously addictive. You don't need to be a mathematical genius to solve these puzzles; it is simply a question of logic and a little patience.