Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A pretty good little book...

It is a book about the envelop theorem used in fonance and economics....A little book butwith wisdom and techniques everyone in the field has to know.... Art pasting is an importanttechnique as we try to analyze something deep inside... Just ask the food we need to take...the water we need to drink...It is essential...and without...pleasure....