The Legend of Achnor  (English, Paperback, Hatton Emma)

a world filled with strange creatures, people, and which has been corrupted with sorna for centuries is lost as their king has taken most of the power, and is still filled with greed. Then he finds it, a power unlike any other. He needs it to become all-powerful, but it is not in his world. After She is in their world, she must find a way to defeat the ultimate evil and find a way home