Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This book is bad for your health

We took this books in a CS class. The instructors made a bad decision selecting this book since it's full of errors. Examples are boring and repeated. In other words, if you didn't understand the example, here goes the chapter without any comprehension. If you are a reader, don't buy this book. If you are a teacher/instructor, don't give your students a hard time with contents in this book.