As an avid reader of cosmology, super-string theory and the like, I am always up for a good book on any related physics subject. But this book is a little too much rehash of what has already been said in many other books. I was hoping that was only a lead up to a presentation of new theories and discoveries. And I bet the authors thought that is what they were doing.
However ... the two physics professors have missed an important point. The number of hair brain theories in cosmology are legendary. Unless there is math, and/or observation to support the theory in some way, it remains nothing but nonsense. They end with a plethora of such philosophical ideas without presenting any supporting evidence. That is not science.
The preceeding is my main point, but I would also like to give two other criticisms. First, the analogies are really bad and need some work. Secondly, no matter how I tried I could not get certain things out of my head once I had read them. Here is an example: On page 21 it says, "None of us has been to the surface of Pluto or to the bottom of the Marianas trench." I beg your pardon, but the United States Navy bathyscaphe Trieste reached the bottom at 1:06 p.m. on January 23, 1960. That is like saying we didn't land on the moon. No, we haven't been to Pluto - yet.
If what you want is a first book on cosmology and you don't plan on digging into it too deeply and want something pretty light weight I can still recommend this book. If you are looking for the next step forward in an emerging science, this is not it.