This is a great book of Sudoku puzzles of various types It contains the regular 9x9 with three difficulty levels, Twin Sudoku with hard and easy puzzles, Triathlon in two forms, Marathon and Samurai Puzzles 105 Puzzles in all Solution pages are offered in the back of the book to make 210 pages in total. Buy this to really challenge your Sudoku skills. Buy it for the Sudoku fanatic you know. See if you can stump them with these puzzles
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