5907953
9781430310297
If you've mastered traditional Sudoku, you will love Advanced Sudoku with additional challenges not found anywhere else.Take your Sudoku skills to optimal levels and enter a new dimension with the HELIX puzzle.Enjoy the challenge!Musial, Kris is the author of 'Advanced Sudoku Introducing Helix', published 2007 under ISBN 9781430310297 and ISBN 1430310294.
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