Saviors of the Galaxy: In the Beginning
by Michael E. Walston
The galactic computer network is ancient. The elder races that built it are extinct. The civilizations using it for commerce and translation don't know all its secrets. But one lone human has outfitted a trading ship with technologies from its archives, and he roams beyond anywhere humans have previously traveled. Stumbling on a dire threat to the Galaxy's community of cultures, he must fight it!