Instruct: Classify a given review into positive or negative sentiment.
Query: Ugh! Could it have been any more boring than this?

This book is a truly difficult read. You really have to force yourself to turn the pages. It has some useful information but is extremely boring and mechanical. I read both this book and "Going Down guide to Oral Sex" and found the latter to be so much easier and more fun to read. I recommend you try that one first, or search for another book on the subject.