I love this book!! The Narrator was Great..a little hyper sometimes…but Great..I really love how the Author informed us of the People that were behind and involved in the Laws of Physics/Math/Thermodynamics that (at least I) never knew of…it is extremely detailed hence the length..sometimes you may need to repeat some chapters just to make sure it sinks in..which is a good thing…So…if you love to learn as much of Everything as I do this is a Must read/listen…