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Pages: 172, Paperback, Independently published
Independently Published
World's Hardest Sudoku Book Volume 4: Over 1000 Extreme Puzzles for Elite Solvers
Extreme Sudoku Vol. 1: 1200 Puzzles to Break Your Limits
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1000 SUDOKU: Vol. 6: Extreme Large Print Sudoku Puzzles Hardest Brain Games...
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