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This review is from: The Gigantic Sudoku Puzzle Book. 1500 Puzzles. Easy through Challenging to Nail Biting and Torturous. Largest Printed Sudoku Puzzle Book ever.: All ... the sudoku games use a 17-clue sudoku grid. (Paperback)
This is the worst sudoku book I have ever had. I can finish most puzzle in in the Daily Mail Books. Not certain but think these may be cheap computer generated puzzles and even have trouble completing the easy puzzles.