Sudoku Challenge

Relax while having fun solving these 3000 sudoku!, This book contains: * 100 easy sudoku * 500 medium sudoku * 700 hard sudoku * 700 very hard sudoku

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Sudoku Challenge: A Progressive Collection of 420 Puzzles from Easy to Expert with Solutions - Magers & Quinn Booksellers

200 Sudoku Challenges - Very Hard - Volume 10: Testing Your Brain To Keep You Young (Paperback)

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Sudoku Challenge: Collection of 350 sudoku puzzles, easy to hard challenge for all levels. (Paperback)

1,000+ Jigsaw Sudoku Puzzle Book: The Big Book of Jigsaw Sudoku, Puzzles Book For Adults, 1,000 Easy to Very Hard Level, Jigsaw Sudoku Challenge for A (Brain Games) (Large Print / Paperback)