Defy the Fates by Claudia Gray

Hunted and desperate.

Abel only has one mission left that matters: save the life of Noemi Vidal. To do that, he not only has to escape the Genesis authorities, he also must face the one person in the galaxy who still has the means to destroy him. Burton Mansfield’s consciousness lives on, desperate for a home, and Abel’s own body is his last bargaining chip.

Alone in the universe.

Brought back from the brink of death, Noemi Vidal finds Abel has not only saved her life, but he’s made her into something else, something more. Not quite mech, yet not quite human any longer, Noemi must find her place in a universe where she is utterly unique, all while trying to create a world where anyone–even a mech–can be free.

The final battle between Earth and the colony planets is here, and there’s no lengths to which Earth won’t go to preserve its domination over all humanity. But together, the universe’s most advanced mech and its first human-mech hybrid might have the power to change the galaxy for good.