Instruct: Classify a review into positive or negative sentiment.
Query: This book is not as good as others in the same series.

Well, I already had "Mierda: The Real Spanish, etc.", so I decided to buy this one. Italian is my mother tongue, so I bought this book to give it to a friend of mine studying Italian. I had to change my mind. The book is plenty of primary-school-level mistakes that, if you are learning Italian, actually makes the book pretty confusing, and that however aren't acceptable in any instruction book, even though about "bad" words. The vocabulary also is very much "regional" (mainly based on the dialect spoken in Tuscany) and so some of the words won't be understood outside that area. It is a pity, because the book about Spanish is pretty good. The book requires to be thoroughly revised by someone with more familiarity with standard Italian to make it worth even its relatively cheap price.