Glimmerglass by Jenna Black
Release Date: May 25th, 2010
Dana Hathaway doesn’t know it yet, but she’s in big trouble. When her alcoholic mom shows up at her voice recital drunk, Dana decides she’s had it with being her mother’s keeper, so she packs her bags and heads to stay with her mysterious father in Avalon: the only place on Earth where the regular, everyday world and the magical world of Faerie intersect. But from the moment Dana sets foot in Avalon, everything goes wrong, for it turns out she isn't just an ordinary teenage girl—she's a Faeriewalker, a rare individual who can travel between both worlds, and who can bring magic into the human world and technology into Faerie.
Soon, she finds herself tangled up in a cutthroat game of Fae politics. Someone's trying to kill her, and everyone wants something from her, even her newfound friends and family. Suddenly, life with her alcoholic mom doesn't sound half bad, and Dana would do anything to escape Avalon and get back home. Too bad both her friends and her enemies alike are determined not to let her go . . .