phenomen a book

Two sisters, bound by life and death, and by the fate of each other, with abilities unknown to humans and their very existence deemed unacceptable by them, find themselves on the run from a terrible enemy after a frantic escape from imperial intelligence unit. They now find themselves somewhere in an unknown place. What now? How to return to Antarie? And how to gain the strength needed for revenge? These are the questions that Cassandra and Elise must ask themselves.