I'm not sure what happened between the author's writing the first book and this third book in the trilogy, but I could not even finish this one (I made it just over halfway before giving up). Fragments was excellent, and Ruins was excruciating. There were so many new characters and points of view that I just couldn't care about what happened to any of them, even the original protagonists.
Perhaps I should stop reading YA trilogies for a while. I've been very disappointed with several final books lately.