Celestial Chaos (The Commons, #2)

Lieutenant Honora Kharn lives and breathes the Kurran Empire's Special Ops unit. A highly skilled fighter pilot and warrior, she is selected to go back in time and thwart a plot by the Nym, the number-one enemy of civilized space. When she returns home with a man critically injured by Nym agents, she finds herself dishonorably discharged from Special Ops, and responsible for a man centuries from where he should be.

Andrew Claybourne realized too late that the scientists he trusted to handle...