Emma Pass 
Fearless [EPUB ebook] 

The Fearless. An army, powered by an incredible new serum that makes each soldier stronger, sharper, faster than their enemies. Intended as a force for good, the serum has a terrible side-effect anyone who takes it is stripped of all humanity, empathy, love. And as the Fearless sweep through the country, forcing the serum on anyone in their path, society becomes a living nightmare.Cass remembers the night they passed through her village. Her father was Altered. Her mother died soon after. All Cass has left is her little brother and when Jory is snatched by the Fearless and taken to their hellish lair, Cass must risk everything to get him back.