I wasn't sure where this book was going to take me; however, the concept sounded interesting. I found it amazing it took over a hundred pages for Dr. Klein to get to his point. What I enjoyed most were the Dr. Benjamin stories. Whenever there was a "story," Dr. Klein's message came through clearer at the end of these stories than anywhere else in the chapter.
What I had problems in this book was the language he used and the concepts he tries (and fails) to adequately explain. What I'm discussing is that the average adult reads between 6-8th grade level, and this book goes beyond freshman college language. For instance, a tenth grade reader would struggle with a passage like "Multiple concentric circles are generated, emanating from where the rock hit" without consulting a dictionary. When it comes to concept explanations, this is the hardest/weakest area in teaching.
The first part of the book was hard to follow (hint: chapters three and four explore Einstein's Theory of Relativity and what "Quantum World" means); it gets easier to follow (and more interesting) after chapter eight, but that's due to the stories explaining Dr. Klein's concepts. Also, to point out the meaning of "time" in only one fashion (linear) seems a bit smug as all cultures have different ideas regarding "time," just ask the Native Americans.
It took the end of the book (was this his intent all along?) for me to understand the bare bone fact he wants you to learn. It's a simple concept, but true. Thus, more people could enjoy the last chapter with greater ease if the first part of the book was less like a college textbook. Most readers might not last past the first part of the book, and that's sad, as it's the second half which makes it worthwhile. If Dr. Klein is trying to reach only a select educated few intelluctuals, then he has succeeded. Personally, I find reading a box of Macaroni and Cheese more substantial and more appealing (especially those big words for ingredients).