Aeon Legion: Labyrinth:

To protect the Edge of Time from the disastrous alterations of time travelers, the Aeon Legion seeks the greatest soldiers and warriors from the most bloody, war-torn eras in history. Those they deem worthy gain a chance to compete in the toughest training program ever designed.

Terra Mason, a plain eighteen-year-old girl from the modern United States, has an impressive stubborn streak. Her persistence and bravery gains the notice and...