Instruct: Classify Amazon reviews into positive or negative sentiment
Query: THE BOOK FOR PHYSICS

I never bought the Halliday-Resnick book when I studied several Physics courses as an engineering undergraduate, but today, several years after graduation, I am considering buying it because of its immense value as a reference book (and my work doesn't have anything to do with Physics). I still remember all the other books quoted HR at some point. The weak point is, however, that for students who need step-by-step, spoonfed explanations, this is not the book, as it requires the reader to have a good level of Maths.