Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Interesting start, but what next?

Very interesting spin on one of the staples of the sci-fi genre: the alien invasion. The authors go to some length to give the bots in the book advanced technology but not so advanced that humans would have no chance of winning without some sort of impossible deus ex machina tactic ala "Independence Day".My criticisms would be that the book falls into a fallacy that many similiar books have done; while US soldiers are able to kill tens of thousands of bots using giant lasers, potato gun grenade launchers and explosive paint ball rounds, a full-scale nuclear strike from Russia and China doesn't seem to slow the bots down at all. And why exactly is the US going it alone in the world and not working with other countries to develop weapons to fight the bots?Overall it's very entertaining and worth a read. But what happens next? I don't think there is really enough interesting material to keep the series going for two more books as seems likely.