The Sapphire Soul - Eldritch Heart, #3

Monarchs often face the consequences of a predecessor's actions-but death is asking too much. Kitlyn and Oona never wanted power, only to love each other. a potentially deadly desire in a kingdom obsessed with a twisted notion of purity. After years hiding the truth, even from themselves, they sit on the throne together as queens. It only took bringing an end to a horrible war-and the direct intervention of a goddess-for the citizens to accept a marriage between two young women. Earning the respect of two kingdoms affords them the opportunity of learning how to lead, but goodwill won't last forever in the face of complacency.
Their resolve is tested as beasts long thought mythical are spotted around the kingdom, threatening the citizens. The sightings take an ominous turn when a stranger wielding unknown powers strolls into the throne room. Worse , the ancient curse still stalks Kitlyn. A cryptic message from a ghost offers her only chance to survive. if she dares risk the safety of the kingdom to spare her own life.