Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Can't be worse

I bought this book since it was required for my marketing research MBA class. Reading this book was painful as it had all the grammar issues other readers pointed out, and even if you make your way through you realize that it is simply describing stuff you already know a long time ago in an over-complicating way, as if the sole purpose is just to make matters hard to understand. I already decided I would not continue to read this book even if the professor said it would be covered in the exam in details because it is truly a waste of my time.