Barbarian Raiders: Dark Prince

It was the first time they were allowed outside the walls to collect specimens for study that the Amazons descended upon them and Hannah and her best friend were captured.  Three days later and three attempts to escape, terror from above arrived in the form of barbarians that sent the Amazon warriors into a terrified stampede to escape. And, as luck would have it, Hannah seized the opportunity to escape the clutches of the Amazons only to capture the eye of the leader of the raiders, Prince Damian.
 And he captured her as the breeder he had come for. This story inspired the Nine Realms of the Uti series.