This book contains 512 SUDOKU puzzles of varying difficulty, meant to take you to a journey of discovery and eventually mastery of this century's most addictive game. There are plenty of puzzles for you to enjoy: There are 128 EASY, 128 MEDIUM, 128 HARD and 128 EXTREME puzzles, if you want a real challenge. Whatever you?re looking for, there?s something for you in this Sudoku Book. Good luck and play! Keep your brain fit, young, and flexible! Large...