Craig Gallant 
Legacy of Shadow [EPUB ebook] 

Two men of earth stumble upon an artifact that bestows upon one of them control of and responsibility for an ancient space station that stands as the last bastion of freedom in the galaxy. With the support of his friend and others he meets along the way, he does his best to fill the office until a suitable successor can be found. At the same time forces of galactic oppression move to use his presence as an excuse to crush the station. He battles determined enemies, betrayal, and his own inner demons to defend the position blind luck put him into, but in the process, he might have started a process that might destroy every human in the galaxy.