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Pages: 87, Paperback, Independently published
Independently Published
Hard to Very Sudoku Book for Adults: Fiendishly Difficult Puzzles Serious Solvers...
Hard Sudoku Book for Adults: 300 Puzzles with Full solutions
Medium to Hard Sudoku Book: 300 Puzzles for Adults, Teens, and Seniors...
Hard to Expert Sudoku Book: Challenge 300+ Puzzles for Adults with Full solutions
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