Master sudoku with this comprehensive guidebook. The addictive sudoku puzzle has captivated millions of people across usa, uk, australia, india and other countries. This book is intended to help a beginner understand the puzzle and learn how to solve it. Those already conversant with sudoku will discover a variety of secret tools and strategies to crack even the toughest puzzles with ease. The 100-plus puzzles in this book offer different levels of difficulty for "puzzles buffs" to crack. In addition, you get a chance to join the sudoku lovers club, a worldwide community of sudoku enthusiasts and share puzzles, techniques and strategies.