The Glass Complex Box Set (Glass Complex, #1-3)

The Glass Complex, a mysterious computer system embedded in Homeworld's history, aids his survival. He joins the Imperial Navy, helps defeat an alien force (the Xesset), survives a mining planet called Hellfire, loves and loses a Fain. All the while he is developing an ability to communicate directly with starship computer systems.

Gradually, the hunted becomes the hunter. With his mercenary company, his Fain companions, and the support of an AI-controlled superdreadnought, he sets out to defeat a major alien incursion--the Xesset want to destroy mankind and their allies.