The Search for WondLa is a good book. It is very thick, but for me it is easy. I like it. It is about a girl who lives underground on Earth. Earth has been changed a lot. Now there are aliens and cool inventions, and Earth is called Orbana. Eva Nine is the girl who lives underground. When it is time she will come up onto the surface and meet other humans. When a dangerous alien tries to destroy her home, she leaves and travels upward. When she gets up to the surface she has many adventures.