Increase your strategy skills with a good book of Sudoku puzzles. When you're solving Sudoku puzzles, you learn to do things in the most efficient manner. You see, playing helps to increase your sense of time. Frequent exposure to Sudoku will help make a decision and even take action with little to no hesitation. You know you need the benefits of this mental training. Begin solving today. | Nailed It Sudoku Strategy Books by Senor Senor Sudoku, Paperback | Indigo Chapters