The photonic effect
(Book)

The starship Horizon's crew spent ten years trapped across the expanse of space. Now they're finally home -- only it's not the home they knew. The Cluster, once a peaceful coalition of planets, has fractured in the wake of civil war. Captain Demora Kim wants nothing more than to protect her surviving crew. It's what she owes them after years of instability and terror. But in times of war, no one is allowed neutrality. After an attack on a mining station leaves thousands dead, Demi's efforts become almost impossible. Every ship is needed on the frontline. Thrust deeper into a conflict she barely understands, Demi considers a bold choice -- one that might keep her promises but tip the galaxy further into chaos.