After you being able to do lightning fast math in your head. Your family & friends will look at you like you are some kind of a genius. Since calculations are done in your head, you will acquire better mental habits in the process. So you will not just look like a genius. You will actually be one.
A lot of people don't like math but we all need to do it and this book makes it easy to do. It's written in plain language that you don't have to be a math major to understand. Using the strategies and tricks you can improve your math skills in terms of practical applications very quickly.