The Rot (The Raven Rings Part 2) - Siri Pettersen

To protect her homeland of Ym, Hirka left it behind. She travelled through a portal to an unfamiliar world - that world is modern-day Europe. Hirka was supposed to fit in with humans here. And her departure was supposed to be save Ym from the invasion of the blind. Yet none of that has happened. Instead, Hirka finds herself just as much of an outsider among the humans as she was among ymlings. Separated by worlds, both Hirka and Rime must find a way to stop a thousand-year-old evil from destroying not only Ym, but every world in existence.