The Sword of Light - Adam K. Watts

Her adventures seemingly over and farewells made, Mira returns home only to discover that her sister is missing. Meanwhile, Nora is stranded on another world by the same splintered portal spell that took Mira to Daoine.On Danu, Nora has been arrested. A strange being helps her to escape, but not everyone who helps you is your friend; would she have been safer in her cell? While Mira continues to look for her sister, Nora tries to find her way in Danu and come to grips with her newfound magical abilities,..