The Rebel Within (Rebels Book 1)

Sixteen-year-old Annabelle Scott lives under the iron rule of a female-dominated régime that forces males to fight to the death to train the military elite. When pressed into service as a mechanized warrior to capture escaped boys, Annabelle stays true to herself by helping some escape. Her defiance endangers everyone she loves and thrusts her to a place of impossible life and death decisions.