Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Overwhelming

Grimaldi's examples are very terse. His answers to his exercises are even worse. A study guide that showed the reasoning behind the answers would be very helpful. As it is, his "solutions" are often nothing more than the answers.I'm not sure how he's getting good reviews on his book. In my 3 years of college math, Grimaldi's is the most difficult book I've ever had the displeasure of learning from. I can't wait to sell it back.