If you are into solving Sudoku challenges, this book should be read. It illustrates how you can apply Francis" Rules to shorten the time taken to obtain a solution to any Sudoku challenge. If you are not into Sudoku Challenges, then you are missing out on an opportunity for the development of your brain power to meet the needs of modern-day society. More importantly, Sudoku can assist you in overcoming memory loss. Sudoku can easily be done during the many waiting periods you have while boarding your flight, waiting to be served in a restaurant or while on a train. This book tells you how you can start exercising your mind with the logical steps of a modern Sherlock Holmes. The second book in this series, Sudoku is Fun: Taking the Francis" Run, is also available from Trafford Publishing.