Stardust Grave - Chronicles of Nethra, #4

The Stardust Grave draws near. After a failed attempt to seize a powerful artifact, Markus Frost is forced to regroup. In the process, he finds himself face-to-face with people he'd been working diligently to avoid: his former crew. As much as he may loath it, circumstances soon make it apparent that he will need to work with his estranged associates to pry the artifact, the Heart of Thule, free from House Valadar. As Cyrus's grip tightens around the artifact, the Don of House Valadar seizes control of a power he'd never fathomed: power over life and death itself.
To guard this power, he's moved the Heart of Thule to his stronghold in the north, a compound thought to be both unreachable and impenetrable. Even so, Markus and his companions must, once again, attempt the impossible. For if Cyrus is not stopped, the Stardust Grave will pour forth its dark bounty across the world and unleash the very power of death across all Terran space.