Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Too vague and general

I used this book for my programming language concepts course, and I was quite disappointed. It's just way too vague, trying to cover too many things. And few, if any, of the concepts from chaper to chapter carry through to develop a cohesive understanding. I also think most people who'd consider this book (or take a class requiring it) should have the knack to pick this stuff up pretty quickly from experimenting and perhaps a website tutorial or two.I did enjoy the chapter on axiomatic semantics, which offers a straightforward approach to proving programs and more importantly loop invariants. But that was hardly worth nearly $100.