The second novel in the thrilling and epic new fantasy series from the international bestselling author of Red Sister and Prince of Thorns.

On the planet Abeth there is only the ice. And the Black Rock.

For generations the priests of the Black Rock have reached out from their mountain to steer the fate of the ice tribes. With their Hidden God, their magic and their iron, the priests' rule has never been questioned. But when ice triber Yaz challenged their authority, she was torn away from the only life she had ever known, and forced to find a new path for herself.

Yaz has lost her friends and found her enemies. She has a mountain to climb, and even if she can break the Hidden God's power, her dream of a green world lies impossibly far to the south, across a vast emptiness of ice. Before the journey can even start, she has to find out what happened to the ones she loves and save those that can be saved.

Abeth holds its secrets close, but the stars shine brighter for Yaz and she means to unlock the truth.