This book is fantastic for experts. These sudoku puzzles are great for experienced. It will allow you to improve and eventually master the rewarding game of sudoku. • 200 enjoyable sudoku puzzles. • Play at home and whilst traveling. • Able to play on the train, bus or plane! • Keeps your mind active and performing well. • Squares are big which will allow you to make mistakes. • One puzzle per page makes it easy to read. • Hard yet challenging brain teasers. • Answers at the end of the book. No need to guess answers! • Solutions allow you to monitor your progress. • Sudoku gives your brain the ultimate workout. • It keeps you and your mind healthy and productive. • It helps to maintain and improve your memory. • It also can increase your concentration and focus.