Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Wait a second!

I felt that the book may have overstated it's content, expecting a decent description of superstring theory. This book certainly is lacking in that regard. However after reading the cover, I noticed that it doesn't promise to be that!On the other hand, the book delivers what its cover promises: 'an exciting exursion into the discoveries that led...' to the theory of superstrings. Well, it may not be too 'exciting', but the author's enthusiasm for the subject is infective, and I found the book enjoyable to read.To those who are looking for a complete treatment of superstring theory, I cannot reccomend this book, but if you are interested in the path taken to the theory, this may be a worthwhile read.