Alright, I have to give this series more credit than I did after I read the last book. Willis did a masterful job tying all the threads from Blackout together. However, I still did not enjoy it as much as her other books, and I really feel that Blackout and All Clear would have been much better as one book.
I like the geologic magic focus, but I feel like the author need to open up the world a bit more. I shouldn't finish the book understanding less about a magical element than the main character does.