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New York Post Fiendish Sudoku: The Official Utterly Addictive Number-Placing Puzzle
New York Post Fiendish Sudoku The Official Utterly Addictive NumberPlacing Puzzle Author:Wayne Gould
200 New Puzzles -- From Fiendish to Super Fiendish
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.