http://www.amazon.com/gp/bestsellers/books/14560/ref=pd_ts_b_nav/102-4540543-7840144 The number one bestseller, in the "general physics" listing, is Douglas Giancoli's college physics textbook. Smolin's The Trouble with Physics comes right after, so if we are talking about books for general audience, anything that is not a textbook, Smolin's IS the number 1 bestseller on amazon at the moment. It has been that way for some 3 hours, that I've noticed. the time is 1:30 PM pacific here. Peter Woit's book comes close after and then things like Brian Greene "Elegant" and Lisa Randall "Warped" and Penrose "Road" etc. cant expect it to last so good----Smolin's book is not even actually available, people are advance ordering it. list changes every hour but the #2 ranking has been steady for a while. I'm surprised at its popularity. Neat! BTW A noted member of the Harvard physics faculty has contributed an "I hate this book" review----says it is "anti-science"