Book one of the Heartspire Trilogy. 

On the day an Unseelie princess is meant to wed a Seelie prince—and bind two warring courts—Princess Calypso burns her vows and vanishes into the mists of the Veilborder. 

Disguised among smugglers and miracle‑hunters, she finds the one thing a crown never gave her: choice. But when storms begin tearing the Convergence Lands apart, whispers rise that the missing bride has doomed the world. 

Prince Atreus, heir to the sunlit Seelie court, never wanted a marriage forged in politics. When Calypso runs, he goes after her—not to drag her back, but to keep a fragile peace from shattering. Incognito and at odds, the runaway princess and the prince who should have been her enemy collide where light and shadow meet. 

Together they uncover a myth older than their kingdoms, a magic that answers only to consent, and a fire that is neither day nor night. To save their realms, they must choose unity freely—or watch the world split for good.