Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not a huge payoff

This book, while well-written, had some plot problems with which I was unsatisfied by the end of the book. I didn't think the main character's secret about his sibling was as shocking as the build-up indicated, and I couldn't believe the villian's motivations against the protagonist at the end of the book. It just rang false to me--if a villain is just a plain ol' psychopath, that's one thing, but here the villain has a rationalization for [pulling] over the protagonist that just didn't gel.