Crown of Light and Ruin. The Frostbound Saga, #4

The world is breaking. Cracks split the sky, the sea trembles with an ancient hunger, and the Deep-once a distant whisper-now calls Aria by name. Its power presses against her bones, testing the limits of her strength, her sanity, and the fragile humanity she is desperate to keep. As the last surviving city prepares for a war it cannot understand, Aria and Kael make an impossible choice: they will not wait for the Deep to consume the world.
They will walk into its heart. But the City of Cracks hides more than fractured stone and dying magic. It holds the truth about Aria's past, the key to the Deep's awakening. and the terrible price required to stop it. Enemies gather. Alliances fracture. Love becomes a weapon-and a weakness. To save the world, Aria must confront the darkness inside her before it claims everything she loves. A powerful continuation of the epic romantasy series, filled with tension, sacrifice, and a romance forged in fire and shadow.