If you want some explanations, it's probably best to read my original review. To sum up: strange abandoned alien city on alien planet; the human expedition to check it out has formed a colony at its base.
The few weaknesses I experienced the first time around didn't bother me at all this time. Maybe it was the audio? Emma Newman's reading makes it all seem wonderful and natural. And I feel she handles Ren's anxiety very well. I loved seeing the colony through Ren's eyes. I also had a slightly different take on the characters this time around.
I know some people aren't all that fussed about this book, but I think it's awesome.