Harvest Moon - A New World Series, #1

Seventeen-year-old Jessa lives in the remote mountains of Kentucky and has always found peace in the forest. Close to her eighteenth birthday, her dad buys her a book and things begin to happen. With her dreams leading her, she uncovers a world within her own with Faeries. They look and act like people she grew up with but she quickly finds she is the one who is different. She is the hidden heir to the throne and the Faeries need her to come home and save them from the Trolls.