Autumn of Angels — Angela Dorsey

Kestrel and Evy get a chance to investigate Evy's mysterious history but soon find themselves on the run from a terrifying adversary. Then at long, long last, Evy gets all the answers to her questions. Her entire world is shaken. But are the answers truthful? There's only one way to know for sure: Evy and her mom must confront the people who have been hunting them for her entire life. And unfortunately, sometimes it's much easier to confront someone than to escape from their clutches afterward!