Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Stay Away!

This is the worst textbook I have ever read. I have two degrees and have attended eight different colleges or universities. This book stands alone as being the worst textbook it has been my displeasure to use. The authors cannot follow a simple logical flow on a single topic. Their categorizations wander around. Their examples are sophomoric. Their diagrams are often next to useless. They spend considerable time examining useless minutia and then fail to address key points. Their chapter review questions are either pointlessly easy or completely unintelligible. In many cases, you cannot discern the answers with the book open. Yet, somehow, the exams that accompany the text are an even greater disappointment. They violate every principle of good testing to reinforce objectives and key points. They state in the book that "security through obscurity" is a flawed concept. Yet, they seem to adhere to the principle of "education through obfuscation". Stay away! Stay far away!