Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A Book on Bridge Building Interesting???? You Bet!!!

It is the mark of a good writer to make mundane subjects interesting. While the grand vision and building of the Bridge was far from mundane, a lesser writer would have become bogged down in details and minutiae of the subject.Not so David McCullough. Perhaps I am a bit prejudiced, having once worked for CF&I, the successor to the Roebling Wire Mills, but I found this book to be substantive, yet comprehensive in detail.For those put off by the length, fear not! The book flows quickly and chronicles a fascinating chapter in the history of both New York City as well as wondrous engineering achievements.