Sudoku 400 puzzles hard: Puzzle book for adults loaded with 400 Sudoku puzzles to train your brain
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Sudoku 400 puzzles hard: Puzzle book for adults loaded with 400 Sudoku puzzles to train your brain
This Sudoku book contains 400 sudoku grids with solutions would be a Great gift for adults on any occasion. each page has 4 puzzles difficulty level is hard.