Featuring easy to follow instructions to help you master Sudoku strategy Stretch your mind with a range of puzzles, from easy to diabolically difficult! Complete with puzzle-solving strategies plus OVER 600 PUZZLES, The Big Book of Sudoku For Dummies is the ultimate book for the puzzle fanatic. Whether you're new to Sudoku or a daily puzzle solver, this big book will give you what you want. With over 600 puzzles ranging from the encouragingly easy to the baffling and bewildering, this big book will get newcomers hooked and keep experts entertained. Discover how to Solve the popular 9 x 9 puzzles - 576 included Work through the 16 X 16 puzzles - 20 included Master the Circular puzzle - 20 included Solve puzzles at 4 difficulty levels: Easy, Tricky, Tough, and Diabolical!