The Daughter of Teragon (Eastern Continent Vampire Series)

In a land where vampires are rulers and humans are seen as little more than objects, Kata is a slave at Saron Castle, where each day she is forced to live in fear of becoming a vampire's next victim. Then a stranger from a faraway land arrives at the castle and changes Kata's life forever. But Kata soon learns that freedom comes at price and she has to decide if it is a price she is willing to pay