I usually don't read books in a series back to back. However, after that ending in Firestorm, I just had to continue reading. So I picked up Thin Air. Poor Jo! She really gets banged up a lot and in this book, her memories have been taken away. Imagine waking up naked and freezing and having no idea who you are. Lewis and David to the rescue.
This is really a cool series. I especially like it when Jo is in the Aether in Oversight and how the author describes what Jo can see. It's beautiful. I also enjoy the author's sense of humor - she gives Jo just the right amount of snark. And the villains - oh, so nasty - especially Eamon and Ashan. I also loved the musical playlist at the end of the book. That's quite a nice selection of music.
There's some bittersweet moments for Jo as well and my heart broke for her. I'll have to pick up the next book soon.