I started this book about ten years ago and never had a chance to finish it until now. It is thought provoking and is certainly teaching me a great deal. There are a lot of ideas and information, so I'm still working on it. If you are interested in physics, how the universe ticks and that sort of thing, by all means check this book out. For those like me who don't understand calculus, don't worry. This isn't about equations, it's about ideas and information. My mother, who loves physics and the higher math stuff, also enjoyed this book. It is good for both scientists and laymen, laymen will just have their knowledge increased a bit more.