Hellhole Trilogy #1: Hellhole by Brian Herbert, Kevin J. Anderson

Against all odds, an exiled general named Adolphus has turned Hellhole into a place of real opportunity for the desperate colonists who dare to make the planet their home. While the colonists are hard at work developing the planet, General Adolphus secretly builds alliances with the leaders of the other Deep Zone worlds, forming a clandestine alliance against the tyrannical, fossilized government responsible for their exile.

What no one knows is this: the planet Hellhole, though damaged and volatile, hides an amazing secret. Deep beneath its surface lies the remnants of an obliterated alien civilization and the buried memories of its unrecorded past that, when unearthed, could tear the galaxy apart.