Seeker — Jack McDevitt

Thousands of years after an entire colony mysteriously disappears, antiquities dealer Alex Benedict comes into possession of a cup that seems to be from the Seeker, one of the colony's ships. Investigating the provenance of the cup, Alex and his assistant, Chase Kolpath, follow a deadly trail to the Seeker--strangely adrift in a system barren of habitable worlds. But their discovery raises more questions than it answers, drawing Alex and Chase into the very heart of danger...