Eternal Promise — Talia Jager

Rylie has chosen the dark faery prince Kallan and has been swept away by the faery world. There's much more to being the Aurorian than she knew. She continues to learn about the faery world and her connection to it. After several fey go missing, the time comes for her to take her place. Rylie is shocked when the investigation leads to the discovery of Satine, Kallan's evil half-sister, who plans on completely destroying the light faery world.