27620652
9780981426174
Jonathan Bloom is the author of 'The Gigantic Sudoku Puzzle Book. 1500 Puzzles. Easy through Challenging to Nail Biting and Torturous. Largest Printed Sudoku Puzzle Book ever. All puzzles are guaranteed to have only ONE SOLUTION!', published 2010 under ISBN 9780981426174 and ISBN 0981426174.
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