Boost your brain power and be entertained with Mindworks Sudoku Puzzles. Packed with engaging puzzles, this giant collection will keep your mind healthy and active. With puzzles that range from the simple to the diabolical, you can become a Sudoku expert in no time! This 288-page book has puzzles from range of easy to difficult levels. It's perfect for cognitive stimulation! You can train your brain for hours on end. This puzzle book is perfect for taking on planes or long bus trips. Watch the hours fly by as you engage your mind. It's also great for gifting to loved ones or your brainy friends! HINKLER'S MISSION IS TO SURPRISE AND DELIGHT every child, adult and retailer we meet by creating books, puzzles and kits with a difference. It's a curious universe - explore.imagine.play.create.Details:11.22" x 8.66" x 1.12"288 pagesFor ages 8 and up