Sudoku Puzzle Book for Adults - 600 Puzzles - Hard to Extreme

600 Hard to Extreme Sudoku Puzzles for AdultsPlaying Sudoku is full of fun. The good feeling that a person gets each time they effectively solve a puzzle can become quite addictive, especially when he/she is feeling depressed or anxious. The more they play, the better they feel.
In this book, we've included 600 puzzles: 300 hard Sudoku and 300 extreme Sudoku.
We've tried our best to put together a book that is easy to read with minimal pieces of paper required. With the unique matte finish book cover, this book can be a great gift for family members, friends, or co-workers who love playing Sudoku.
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