Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Disappointed with this book

This was a poorly written book and like many of the previous reviewers, I found this book filled with errors and relatively useless information. While it does indeed cover a lot of basic concepts, if you're looking to try and understand the concepts, the book will fail miserably.While reviewing the quizzes I find myself constantly going back to the chapter to see if I had missed anything only to see that the chapter simply didn't cover the material.I'm quite a fan of the other demystified books like differential equations, but this book I'm afraid would lead to false sense of self confidence.