The Black Mirror - The Leah Heroman Novels, #3

I just can't seem to catch a break! First, Portalis security guards chased me back into the Other World. I thought I was safe when Fiona and I reunited at Autumnstead, but we were forced to flee the castle. From Mersania, last of the First People, we learned about the ancient queen Tyreina who is waging a secret war across two worlds.  Mersania wishes to teach Fiona and me so we might defeat Tyreina.
However, the evil queen has been weaving a web of deceit and magic for uncounted years. It may already be too late.