Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worthless!

This book has a write up on it's back cover that would lead you to believe that it is the answer to all your RV problems and questions. Not true! It is the most worthless, frustrating piece of printed matter that we have ever read. The Moller's wasted almost the entire text with descriptions of tools that one might use, and have a nasty habit of titling a paragraph "Troubleshooting a Whatever" then telling you that the only tests that can be performed are as previously described in this chapter. Yup, you guessed it.... nothing previously described.