From publisher blurb:
The Wright family wants to open up permanent trade routes to Geneva and Scrap City on Lake Michigan. From the pre-War maps they’ve salvaged, they know that the sea beyond Wright Town connects to the lake. Boat trade should be easy, at least once they’ve dealt with the Haunted Straits.
The Haunted Straits describes an isolated community that perpetuates rumors of vengeful spirits to ward away outsiders. The book includes a history of the area, important NPCs, and plot points.
The Haunted Straits is set in the Broken Earth setting, but with a little work can be used with any post-apocalyptic campaign.