Mystic Empire (Bronze Canticles, Book 3)

Eighty Years have passed since the Mystics founded Calsandria, and now their nation is mired in politics and bloodlines. A woman with no magic, Theona Conlan leads the desperate search for the missing Prince of House Arvad. In the faery realm, Dwynwyn learns that slave creatures are mastering a magic that threatens the fragile peace between the faeries and their enemies. And while the goblin Lunid builds a device to reach across worlds, her masters plot to use it for their own dark ends. But unknown to them all, the gates between realities are about to burst open and plunge humans, faeries, and goblins into a war that can be won only with an undiscovered magic...
One that will unite--or destroy--three worlds.