This Shattered World

Jubilee Chase and Flynn Cormac should never have met.
Lee is captain of the forces sent to Avon to crush the terraformed planet's rebellious colonists, but she has her own reasons for hating the insurgents.
Rebellion is in Flynn's blood. His sister died in the original uprising against the powerful corporate conglomerate that rules Avon with an iron fist. These corporations make their fortune by terraforming uninhabitable planets across the universe and recruiting colonists to make the planets livable, with the promise of a better life for their children. But they never fulfilled their promise on Avon, and decades later, Flynn is leading the rebellion.
Desperate for any advantage against the military occupying his home, Flynn does the only thing that makes sense when he and Lee cross paths: he returns to base with her as prisoner. But as his fellow rebels prepare to execute this tough-talking girl with nerves of steel, Flynn makes another choice that will change him forever. He and Lee escape base together, caught between two sides in a senseless war. The stunning second novel in the Starbound trilogy is an unforgettable story of love and forgiveness in a world torn apart by war.

Amie Kaufman and Meagan Spooner are longtime friends and sometime flatmates who have traveled the world (but not yet the galaxy), covering every continent between them. They are sure outer space is only a matter of time. Meagan, who is also the author of the Skylark trilogy, currently lives in Asheville, North Carolina. Amie, who is the coauthor of the Illuminae Files, lives in Melbourne, Australia. Although they currently live apart, they are united by their love of space opera, road trips, and second breakfasts. You can find them on Twitter @AmieKaufman and @MeaganSpooner.