Amethyst: Princess of Gemworld — Shannon Hale

Amaya, princess of House Amethyst in Gemworld, and her brother love magical pranks. But when one goes much too far, her parents ground the young royal�to Earth! They hope a week in the mundane world teaches her that magic is a privilege�and maybe washing dishes by hand will help her realize that the palace servants should be respected. Three years later, �Amy� has settled into middle school and ordinary life. She doesn�t remember any other home. So when a prince of the realm brings her back to Gemworld and restores her magical destiny, how will she cope?