Beneath the Haunting Sea by Joanna Ruth Meyer

Sixteen-year-old Talia was born to a life of certainty and luxury, destined to become Empress of half the world. But when an ambitious rival seizes power, she and her mother are banished to a nowhere province on the far edge of the Northern Sea.

It is here, in the drafty halls of the Ruen-Dahr, that Talia discovers family secrets, a melancholy boy with a troubling vision of her future, and a relic that holds the power of an ancient Star. On these shores, the eerie melody of the sea is stronger than ever, revealing long-forgotten tales of the Goddess Rahn. The more dark truths that Talia unravels about the gods’ history—and her own—the more the waves call to her, and it may be her destiny to answer.