It's important to be aware of how data is manipulated to shape our opinions. But if you're already aware that numbers can be misrepresented, and a few of the ways it's done like not showing what something is compared to, using correlation to show causation, and drawing graphs so that the bars or lines look larger, you can probably skip this book and move on to something meatier on the same subject. If you're on the fence, this is only a hundred pages or so, so it won't take long to decide for yourself.