Instruct: Classify a review as either positive or negative.
Query: excellent book for the serious student

I wish I read this book before I wasted a lot of time reading all those other Spanish books. This book is perfect for the serious student of Spanish who wants to know the details and fine nuances of speaking the language. This book is not for the casual Spanish speaker or tourist who wants a quick fix because his plane to Spain leaves tomorrow. My frustration level is a lot lower now than before. I found this book in a public library and now I am going to buy it and use it as a reference