Enna Burning by Shannon Hale
Synopsis: Given the power to summon fire, a young girl finds herself torn between duty to her country and her fears that she will be consumed by magic. Review: Enna Burning is a sequel of sorts to The Goose Girl, but as far as I know it is not based on a fairy tale. Enna is goose girl Isi’s confidante, and her adventure begins when her brother Leifert shows up with a mysterious vellum that has granted him the ability to summon fire. But his…