Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Useless study aid

This book is the companion to the text. It provides step by step solutions to help in arriving to an answer. However, it only provides a solution to the odd questions, and only to about half of those. It seems to skip the majority of problems that I got stuck on. For example: I had a problem on question #15, but the manual provided answers for 11 and then proceeded to #17. This was aggravating. $40? I think not. I may have paid $4 if I had been warned. DO YOURSELF A FAVOR AND SKIP THIS PIECE OF TRASH.