For a lay person, this book about the mathematical formulas that undergird our world is strangely accessible. I was constantly fascinated by what physicists already know... the formulas for gravity, speed of light, etc. are both eminently simple and strikingly complex. Their interplay shows how narrow of a window the universe allows for life as we know it to exist.
For anyone who loves physics, but isnít a physicist, this book will provide a gripping read.