Elements - Prism's Edge - Jack Wilde

After the death of Lily's sister, Star, Elder Karyn assigns fifteen-year-old Lily to the office as the Light Element of Earth-a role for which she feels very unprepared. She finds herself facing a foreign culture in which she must learn to avoid the Dark Elements, navigate the nuances of human society, and graspthe Elemental laws, all while struggling to control her burning hunger to find her sister's killer.With her newfound powers and weapons, Lily must learn to survive the perils of this new world...