Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not a classic, just very good

Xenocide suffers from not being as consistent as the first two books; the first half in particular is very pedestrian, and it sometimes gets bogged down under the weight of its own ideas. Once it gets going, however, it reaches the heights of the first two books - even surpasses them on occasion. If you didn't like "Speaker for the Dead" you probably won't like this one either; in which case I would advise you read Ender's Shadow and leave it at that.