Andrew Keith & William H. Keith 
Cohort of the Damned [EPUB ebook] 

A fugitive on the run tries to escape his dark past by joining the fight against the aliens in this military sci-fi series. Wolfgang Hauser was a privileged and pampered aristocrat—until the day aliens invaded his world and took everything from him. Now he’s an outcast accused of cowardice and murder. Without a family or a home, he’s on the run. And the only chance he has to escape his enemies is to join the Fifth Foreign Legion. But the Legion demands a high price from the misfits who flock to his banner in search of a new life. Wolfgang must now surrender his name, his beliefs, and his very identity to become a Legionnaire. But after losing so much already, can he bare the cost of hope?