Defy the Worlds by Claudia Gray

An outcast from her home — Shunned after a trip through the galaxy with Abel, the most advanced cybernetic man ever created, Noemi Vidal dreams of traveling through the stars one more time. And when a deadly plague arrives on Genesis, Noemi gets her chance. As the only soldier to have ever left the planet, it will be up to her to save its people…if only she wasn’t flying straight into a trap. A fugitive from his fate — On the run to avoid his depraved creator’s clutches, Abel believes he’s said good-bye to Noemi for the last time. After all, the entire universe stands between them…or so he thinks. When word reaches him of… Read more.