Angelfall - The Eternal Flame Series, #2

Their love could break the world. Lyrix, the first new angel to emerge in a millennium, brings hope for her endangered race. But the weight of duty is heavy. As the newest and strongest, she is expected to become a Seraph, one of the stoic angel kings and queens. She dreads the prospect of losing all her emotions in the transformation, but avoiding her destiny may lead to extinction for her kind. Wren is half-human and a second-class citizen among angels.
A chance meeting with Lyrix leaves them both yearning for a life lived on their own terms. A relationship between an angel and an angelborn is unprecedented, and powerful forces oppose their union. On a journey to the human world, tragedy strikes, and Wren and Lyrix realize their love may destroy both worlds. A standalone, new adult paranormal romance.