From publisher blurb: North Sordack Valley is set northeast of Commerstance and was originally slated for the Filbar Dual series but the players didn’t go in that direction. This area is filled with individual challenges synonymous with the Filbar Area series. This ‘sandbox’ style adventure has multiple different encounters can be used in a variety of ways. The general setting allows you to customize it for your own campaign! This adventure setting was designed for 1st/2nd Edition AD&D for the Filbar Dual Campaign for various level groups of adventurers. This adventure is easily adaptable to most any game and system. Save yourself some time and utilize it for several one shot adventures or a continuing campaign setting!