Switched

When Wendy Everly was six years old, her mother was convinced she was a monster and tried to kill her. It isn't until eleven years later that Wendy discovers her mother might have been right.
With the help of Finn Holmes, Wendy finds herself in a world she never knew existed - a world both beautiful and frightening - and Wendy's not sure she wants to be a part of it.
This is the first in Amanda Hocking's stunning series, the Trylle Trilogy.