I received this as a LibraryThing Member GiveAway (thank you) and the copy I received had too many mistakes for me to rate this as 4 or 5 stars as the content deserves. Part of the book was perfect, with seamless reading from one idea to the next; part was just the usual make sense of the ideas - and they did make sense. The content was a good balance between "facts", interpretation and a little judgment. This was really very interesting and generally well written. ( )