Dear puzzle lovers, We have prepared a brand new and different book for you. We have gathered the puzzles in this book under 222 difficult sudoku types. This book will appeal to people who are experienced in solving sudoku, who have solved sudoku many times to pass the time and say, "I want very difficult puzzles". In short, everyone in the name of difficult sudoku will find what they are looking for in this book. Expert Sudoku is very different from the other sudoku books on the market that you won't be able to put down for a long time. Moreover, it contains 222 puzzles. When you start solving the Sudoku puzzles in this book, you will see the difference, improve your skills, have fun, have great fun, and become more and more expert. We wish you a good time. One last reminder, check our solution pages whenever you need help... ;