Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Nothing practical but theoretical

I bought this assigned textbook for the class. Yes, I admit it's indeed the bible of inventory theory, but if you want to learn something pratical, don't touch it. It explains everything by its overwhelming notations and formulations without realistic examples. I am a M.Eng student and want to learn something to apply in my job, but it makes me have no idea about what I can do after reading thoes countless proof of contless formulations within the whole book. This is definitely for someone who wants to dive into his PHD dissertations.