Angel Armor: Yesterday

The third book in the "Angel Armor" series! Following the events of "The Cassandra Conflict," Louis Williamson is ready to head back to Earth. In order to find a way back, he must travel to the other continent on Sin in search of a spell to get home. However, the other continent is also Lithmenar's homeland. What secrets does he have about his past that he doesn't want the others to know about?