★500 Killer Sudoku For Adults Easy To Hard★Do you think you're an expert at puzzles? Enjoy the century's most addictive puzzle game!Killer Sudoku is a very popular variant of classic Sudoku that adds some new challenges. These puzzles have more going on and can be extremely satisfying to solve. Once you try them, you'll find it very hard to go back to boring plain old Sudoku!This book has 500 puzzles, in order of difficulty ranging from Intermediate to Tough, Each puzzle has a single, unique solution. ♥ 500 Puzzles. ♥ 8.5 x 11 inch Book Layout. ♥ 4 Puzzles per Page. ♥ Ideal for Experts. ♥ Hours of fun and entertainment to enjoy! ♥ Variety of Levels. MAKES A GREAT GIFT: For the sudoku puzzle lover, this books makes a great gift for any occasion! Birthday, Halloween, stocking suffers, road trip or more, everyone will love it!