This is an extremely difficult book to review. Though a layman in this field, fortunately, I have researched quantum mechanics and read enough books over the last few years on the subject to do a reasonably informed job of covering the salient points:
1) I have no doubt the author feels he has attempted to construct this book in a manner that can be understood fairly easily by many. Not to be insulting to anyone, but this book is definitely not for the novice.
2) Even with some background in quantum theory, there are many portions of the dialog that went way over my head, as I suspect, it will for many.
3) If you are an average reader interested in quantum physics, I have found several other books that cover this suject in a more readily understandable way. I suggest Machio Kaku or Bernard Haisch.
4) If you are a science student - college level or above, this book could be very insightful and of value for you.
So why Four Stars??? While the ultimate value of this book will be determined by each individual reader, it is critically important that a more widespread understanding of the scientific importance of quantum mechanics is shared by a larger audience. This book contributes to that cause and contains valuable information.