Xol by Sonia Nova

Ava never dreamed she’d fall for a hot alien vigilante, yet she’s fallen hard for the red-skinned brute.
All Ava wants to do is stop slavery. Life as a slave isn’t what she signed up for and she leads a team with a sexy alien mercenary, Xol, to rescue those captured on Elrilia. Her near-miss with a lifetime as a slave gives her great purpose to set them free.
Xol agrees to step off their spaceship and help Ava on Elrilia. Though he’s out of place on the planet, he can’t deny the pull he feels toward the small Terran. Her strong spirit makes his heart race and he’ll stop at nothing to protect her.
Ava’s budding feelings for Xol grow as they work together on the rescue mission. But the perilous journey may separate them forever if she’s captured and taken away.