Steven L Kent 
Clone Alliance [EPUB ebook] 

Earth, 2512 a.d. Humans populate the six arms of the Milky Way Galaxy. The oppressive Unified Authority controls Earth’s colonies with a powerful military made up almost entirely of clones- until civil war leaves the U.A. struggling to survive… Stranded on a frontier planet, rogue clone Wayson Harris is desperate to get back into battle. When a group that wants to return to the Unified Authority’s command and protection asks him to deliver their offer of allegiance, Harris finds himself in the uniform of a U.A. Marine once more. But as he leads a strike against the enemy, Harris discovers that the rebels have a powerful ally no one could have imagined…