Does this seem like a good book?

Humans are forced to live underground in things called Edens because of global warming and a huge drought. Aliens attack them after they have been living underground for three-hundred years because their planet was destroyed and they need a new place to live. Most of the humans think that it is unsafe to come to the surface because a small group of people are trying to protect them from the aliens. They eventually come out to combat the aliens and the book goes on from there. Would you read it? If not, what should I change? Are there any things I should change? Thanks!