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Pages: 100, Paperback, Independently published
Independently Published
Hard Sudoku for Smart People: Brutally Difficult Puzzles Confident Solvers 50+ Expert-Level...
Sudoku Very Hard Book: Book Puzzles 50+ Puzzles, 110 Pages 6x9 Inches...
Parson's Porch
So You Think You're Smart....
Hard Sudoku: 300 Expert Level Logic Puzzles: Challenge Your Brain with Difficult...
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