The Navigator of Rhada

In an ancient starship, Kynan the Navigator roamed the spaceways of the Second Stellar Empire. A priest of the Order, he was committed to guarding the secrets of the past. After all, access to knowledge was a sin... for it was science that caused the Dark Times which nearly destroyed mankind. Now the survival of the Empire is again at stake. Kynan's revered bond-father will be murdered and his loved ones taken captive. The young Navigator, fighting for vengeance and honor is unaware that greater powers are at work, and that he himself can determine the fate of the Empire... (from the back cover of the Ace Books paperback edition)