Are you up to the challenge? Sharpen Your Mental Skills More! If you enjoy solving challenging sudoku puzzles, these are for you! Solve Easy to Extreme puzzles with the 5 Step Sudoku method. 310 Puzzles! Hours of Entertainment! Many New Puzzles in Five difficulty levels: Easy (10 puzzles), Medium (20 puzzles), Hard (40 puzzles), Unfair (80 puzzles), Extreme (160 puzzles) Hours of Fun! The answers are in back! puzzles increase gradually in difficulty For those hooked on challenging Sudoku puzzles A great gift for yourself and others Easily tear out the puzzles Can you and your friends solve all the puzzles? Buy some today and see. From the Back Cover: Thank you for purchasing Volume 2 of the book 5 Step Sudoku I For Experts. If you like to solve harder puzzles than volume 1, you'll find that inside. This is second in this series For Experts. Each level doubles the puzzles for you, ex: 10 Easy, 20 Medium, 40 Hard, 80 Unfair and 160 Extreme puzzles. This book has 310 puzzles and two puzzles per page. You have 5 sudoku solving methods or steps that can help you solve your sudoku puzzles. You can keep your thinking and problem solving in top shape, by solving these puzzles. - J.J. Popps