47792977
9781544768502
Books, Sudoku is the author of 'Sudoku Puzzle Book, 800 Puzzles, 200 Easy, 200 Medium, 200 Hard and 200 Extra Hard: Improve Your Game With This Four Level Book (Sudoku Puzzle Books Series 2) (Volume 31)', published 2017 under ISBN 9781544768502 and ISBN 1544768508.
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