Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Still a classic

I ordered a new copy of this book after losing my original from university days. I have found it occasionally invaluable in engineering for twenty years - basically "everything you ever wanted to know about math" in a relatively compact text, without being one of those huge and awful multi-author collection "handbooks". The fact that it is still in print from the 1960's bears out that I am not the only one with this opinion.