47797669
9781544839899
Books, Sudoku is the author of 'Sudoku Puzzle Book, 1,000 Puzzles, 500 HARD and 500 EXTRA HARD: Improve Your Game With This Two Level BARGAIN SIZE Book (Sudoku Puzzle Books Series 2) (Volume 38)', published 2017 under ISBN 9781544839899 and ISBN 1544839898.
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