If that's the book I'm thinking of I was also initially impressed until like chapter 6 when, after spending the book talking about how simple and elegant this t

If that's the book I'm thinking of I was also initially impressed until like chapter 6 when, after spending the book talking about how simple and elegant this theory was, it opens with "what if there wasn't just one string but lots of strings, and they were n-dimensional etc etc..." and threw it all out the window. I put the book down.