Heir of Stone (The Cloudmages #3) (The Cloudmages) (Book:3)

In this final installment of the Cloudmages trilogy, set a generation after Mage of Clouds, the oldest of Meriel's children, Sevei and her twin brother Kayne, have reached adulthood. But their world is about to be turned upside-down when all of their widely scattered family are simultaneously attacked.