Switched (Trylle Trilogy #1) by Amanda Hocking
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 finds out her mother might've been telling the truth.
With the help of Finn Holmes, Wendy finds herself in a world she never knew existed - and it's one she's not sure if she wants to be a part of.
First I borrowed this from library and then I bought this, yet I still haven't