It is definitely different enough from Armstrong's Powers
series that it did not feel like a redux, but still closely connected to the events from that series. (I believe I read that she plans to have both groups meet up later on.)
I was not sold on the characters, but I did enjoy the story, even if the writing is weaker than I would like. I certainly would not say it is for everyone, but if you liked her first YA series, you'd probably like it well enough. I'll be reading the next one, however.