J.J. Snow 
Gauntlet [EPUB ebook] 

A commander driven by duty. A crew who might be humanity’s only hope. A boy caught between a sociopath and a directive. A government assassin with a dark secret. As war rages across the galaxy, each of them have a role to play. For some it will be their last. Gauntlet is the second book in the Reilly Campbell Chronicles, a trilogy that follows Captain Campbell and her crew as they fight for each other and humanity against impossible odds on some of the toughest terrain in the galaxy. Their story isn’t over yet.