Queen of the Falconstar. Falconstar Trilogy, #1

Zlata never wanted to be a hero. She just wanted off Graznav Station. When nomadic space raiders from beyond the Outworlds attack her home and carry off her friend, Zlata makes a split-second decision and volunteers to be taken captive with her. It's an impulsive decision that will either save them both-or doom them to lives of slavery among the stars. Aboard the warship Falconstar, Zlata becomes the property of Lord Khasan Valdamar, a fierce warrior-lord whose star clan teeters on the edge of extinction.
Hunted by his enemies and betrayed by his allies, Khasan desperately needs to restore his clan's shattered honor. What he doesn't need is a scheming slave with dangerous ambitions of her own. But Zlata is no ordinary captive. Cunning. Ruthless. Pragmatic. She sees opportunities where others see only chains. In the treacherous world of Hameji politics-where honor is won through blood, and betrayal lurks in every shadow-Zlata begins an audacious climb from slave to queen.