Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Subtle but in the end entertaining

Definitely not the best Doctor Who Missing Adventure, but it's got its good points. The story moves slowly, and there's not much action. The resolution of the chief bad guy's fate is a little bit of a letdown.If you're a fast reader who doesn't mind a more slow-moving story, go ahead. If not, don't be afraid to skip this one.