Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Rating by stars may not be fair.

I am a practician of Process Control and SPC, not a member of academia. I purchased this book hoping that it is easy to read and examples would be applicable to manufacturing processes. In contrary it is full of matrix equations, integrals, and derivatives. Examples are not for a practician. It may be the greatest book for a PhD student, I wouldn't know. But if you are an engineer go with something like Paul W. Murill's " Fundamentals of Process control Theory".