I've never had an economics class, and don't have the patience to wade through a textbook. So, for me this book is perfect. Basic concepts are presented without any math. It explains how these concepts are related, and how changing one variable changes another. It gives me just enough knowledge to read a business journal, or discuss some topic at a party. I have to reread it sometimes, because I forget -- but I can do that in a couple of hours, with the clear and simple way it's written. It strikes me as simple, without sacrificing substance.