I have a new favorite author - Karen Mahoney!
I just finished The Iron Witch, the first book in her new trilogy. Donna Underwood was attacked and almost killed by dark fey when she was just seven years old. They killed her father and put her mother in a mental institution. She lives with her aunt and is being groomed to join the alchemical secret society her parents were a part of. Then the dark fey kidnap her best friend, Navin. It is up to her and her new (and gorgeous) friend Xan to rescue him.