From audible.com:
Lanik Mueller is a "rad" - radical regenerative - a freak who can regenerate injured flesh...and trade extra body parts to the Offworld oppressors for iron. On a planet without hard metals, or the means of escape, iron offers the promise of freedom through the chance to build a spacecraft.
But it is a promise which may never be fulfilled, as Lanik uncovers a treacherous conspiracy beyond his imagination. Now charged with a mission of conquest - and exile - Lanik devises a bold and dangerous plan to finally break the vicious chain of rivalry and bloodshed that enslaves the people of the planet Treason.