47777367
9781544234502
Sudoku Puzzle Master is the author of 'Sudoku Puzzle Master Book 1,200 Puzzles, 300 Easy, 300 Medium, 300 Hard and 300 Extra Hard: Four Levels Of Sudoku Puzzles In This Jumbo Size Book (Sudoku Puzzle Book Master Series) (Volume 26)', published 2017 under ISBN 9781544234502 and ISBN 1544234503.
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