" I confess that while I found this book gloriously geeky, I often wished that its explanations were more thorough and/or clearer. I understand that the book was probably intended to be of a welcoming, accessible length, and that a great deal of its audience was expected to be people already at least a little knowledgeable about the physics discussed, but I felt that many explanations - even about things I think I understand reasonably well! - were confusing. Particularly given Dr. Krauss's current level of skill as a public speaker, I am hopeful that the updated version (the existence of which I did not know about when I checked this version out) will have improved and better edited explanations. "
— Betsy, 2/17/2014