This stylish book is a collection of 200 challenging Sudoku puzzles. The beautifully designed compact format makes this a must-have item for your purse or tote bag. When you have time to kill, whether you're stuck in a waiting room, waiting for your flight at the airport, or sitting on the train during morning or evening commute, this convenient Sudoku book will not only supply entertainment but it will also exercise your mind. This book ensures that devoted puzzle fans will be kept entertained for hours. "Sudoku 2" (Orange polka dot spine) is part of the Elegant Puzzle Series, which has attractive covers with an elastic bookmark. The books are portable, convenient, and make great gift items.