His mother said his uncle's name only once—on her deathbed, with her last breaths, warning him never to claim the inheritance.

"Don't go there, Caleb. Promise me."

Three weeks later, the letter arrives. Caleb Mercer is the sole beneficiary of an estate in the Appalachian mountains: a cabin on forty acres in a hollow so remote it doesn't appear on most maps. An uncle he never knew existed. Property his family spent generations hiding from him.

The cabin should be falling apart after a century of mountain winters. Instead, it's pristine. Smoke rises from the chimney. Someone has been maintaining it. Someone is there now.

In the cellar—far larger than the cabin above, carved into the bedrock itself, walls covered in symbols older than any alphabet—Caleb finds a chair. Ancient. Carved from black wood. Waiting at the center of  ...