The Virus sourcebook for Traveller: The New Era. This book fleshes out numerous strains of Virus, details vampire ships and fleets, and provides 3 short adventures. Also included are robot design rules.

This book radically changes the view of Virus from a purely malicious entity to an actual sapient life form capable (at least in theory) to the full range of motivations and emotions experienced by other sophonts. In that sense, it finally brings AI into the Traveller universe.