The Love that Divides Kingdoms (en Inglés) - Harper Harper Bennett

Two domains exist in an eternal, wary opposition. The Floral Kingdom of the Orange, a radiant expanse of shifting autumn leaves and resilient, vibrant petals; and the Forest Kingdom of the Blue, a deep, cool realm of endless twilight woods. For generations, they have known only a frosty truce.

But something shifts. A whisper of forgotten prophecies begins to circle. And at the heart of the storm is Alea Jogchel Sadres, "Lea" to those who truly know her. As the third princess of the Floral Kingdom, she is expected to be decoration. Instead, Lea is a secret master of the blade, her fighting spirit as indomitable as the autumn wind. Her greatest secret, however, is not her skill in battle, but her heart. It has been stolen by the one person it shouldn't: Prince Alaric, the solemn first prince and heir of the rival Blue Forest Kingdom.