From publisher blurb:
The fifth offering of the Filbar Dual (FD) series is Venture into Sordack Valley and takes the small group of young adventurers and puts them on the border of the frontier. The small town of Commerstance is located on the edge of the Lordek River separating civilization from the wild. Several locales are present for the aspiring group of adventurers including two wanted criminals.
This adventure setting was designed for 1st/2nd Edition AD&D for the Filbar Campaign for a 2-4 low level adventurers and DM. Primarily designed for two players, the FD series has included the opportunity for NPC assistance. This adventure is easily adaptable to most any game and system. Save yourself some time and utilize it for a one shot adventure or a continuing campaign!