Brian Greene's book on the superstring theory, a Pulitzer Prize Finalist, deserves a read - if only for an appreciation for the discipline and complexity of advanced physics, and his ability to reduce extremely complex theories to a level that a smart, but "normal" person can understand.<br><br>I say it that way because the book itself is still a pretty advanced read.  While Greene does a very fine job in serving up both the history and the theory of superstrings, quantum mechanics, relativity and Newtonian physics - it sure helps to have some level of familiarity with them.  20+ years removed from my last physics class in college left me struggling a bit to keep up - even with Greene's effective "common man" writing style.  You can only reduce the explanation down so far and still be effective in conveying the profundity of it.<br><br>End of the day, Greene does a fine job trying to show that the superstring theory has both theoretical and physical support as the foundational "theory of everything".  His discussions of both the theory and the history of its development are well written and very interesting - as well as supported by copious endnotes for further digging.  If you have interest in the topic - pick up the book (after you've brushed up on your college physics).