4769553
9780061173370
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.Gould, Wayne is the author of 'New York Post Difficult Su doku The Official Utterly Addictive Number-placing Puzzle', published 2006 under ISBN 9780061173370 and ISBN 0061173371.
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