Sentinel by Anna Hackett

Fighting for love, loyalty, and freedom on the galaxy’s lawless outer rim…

When Quinn Bennett’s exploration ship is attacked, the security chief finds herself abducted by alien slavers. Unable to save her crew, she is taken across the galaxy and sold to a desert scavenger on the lawless planet of Carthago. Driven by her guilt and failure, she’ll do anything to escape and save the other abductees from her ship. Chained and forced into servitude, she’s waiting for her chance to strike, when across a dusty trading post, she comes face to face with a big, cyborg gladiator.
Jaxer Rone’s loyalty is to his imperator—the man who saved him from a lethal cyborg military program. Jax works tirelessly for his gladiatorial house and would die for his fellow cyborgs. His emotional dampeners have never functioned well, but while he feels some emotion, he never lets it get in the way of his duty. Right now, his mission is to find the stolen humans from Earth. But when he rescues the fierce, relentless Quinn, he starts feeling a rush of emotion he’s never experienced before.
Quinn and Jax join forces to track down the aliens holding the other Earth women captive. Side by side, they venture into the desert and uncover a desire hotter than the desert suns. But the aliens who captured Quinn want her back. In order to protect Quinn, will Jax embrace his newfound feelings or shut them off to keep her safe?