The Chronicles of Faerie:

The third book in this critically acclaimed trilogy, which "Booklist" described as shimmering with magic, myth, and romance Dana has few memories of her mother, who disappeared when she was small. But she has always dreamed, despite her fathers discouragement, that her mother would come back one day. When her dad decides to leave Ireland and take a job across the ocean in Canada, Dana is heartbroken. How can she leave her home and the only chance of seeing her mother again? She runs away, high into the fairy mountains of Ireland. Following ancient paths, with a mysterious wolf companion at her side, Dana encounters a world of tragic enchantment and fairy romance, and discovers a great secret about herself. With lush descriptions and rich Celtic lore, plus cameo appearances by characters from the previous books, this latest chronicle will satisfy fans of the series and entice new readers.