With 300 puzzles and answers at the end of the book this collection is sure to keep puzzlers busy for hours.Here are the amazing benefits of playing Sudoku:.Improves your memory. Memory and logic work side-by-side when you are playing Sudoku..Stimulates your mind..Learns to do things quickly. .Increases your concentration power. .Feel Happy.If you are looking for a interesting sudoku book, then this book it is the book you want!Order your copy today and enjoy it!