Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A Horrible Way to Learn Geometry

I used this geometry book in my math class this last year and found it extremely frustrating to use, even in co-ordination with a math class (although the teacher was not very helpful). My class and I often had to use the book as our only resource, because the teacher was so awful, and it was difficult to learn from its explanations. If you're looking for a good book on geometry, look elsewhere!