Captive Omega by Riley Carver

The invasion is real. And so is the unbreakable bond between an Alpha and his forbidden Omega.
I’ve been studying the stars and preparing for the coming alien invasion. But there’s one thing I could never be ready for: the way my body responds when I come face-to-face with an Alpha. Stolen from my family and taken aboard a glittering spaceship, I must make peace with the fact I’m an Omega—and that I’m promised to an alien on another planet who I’ve never met. As I make my way toward the unknown, I find myself drawn to Drax, the stubborn, cold Alpha who commands the ship. The primal attraction between us might just be our undoing.
Abducted, scared, and filled with confusing desires, I learn the galaxy will soon be at war. Can I find a way back home? Or will I discover that home is wherever Drax is?