Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The Groan Empire

Let me offer a little advice to those of you considering buying this book: DON'T. I've wasted money and time that I will never get back. It is just about the worst Doctor Who novel in any series. The Doctor is portrayed as a ditzy shadow of himself who does pointless things simply for the heck of it. The visited planets were agonizing to read about. And to add insult to injury, there is a "Marty-Stu" (male "Mary Sue") character who inserts himself into the Doctor's party based on no merit other than existing and who becomes the "narrator" of the book, with little asides into his own uninteresting life story. By page 100, I gave up and just skimmed through the rest of the story; it wasn't worth it. Do yourself a favor and buy a different Eighth Doctor novel, like "Anachrophobia". Any one but this one.