Dead Man's Run (Pathfinder)

From publisher blurb:

The glint of gold coin and flash of pale bone peek out from the dark timbers of sunken buildings as a sad ferryman slowly pulls his boat across the clear water. This is Dead Man’s Run, the only safe passage across the wild Brimbrook; for miles in either direction river races over rocky rapids and steep waterfalls, carving an otherwise impassable chasm through the forested hills. Any who pay the price of passage—two golden coins given as tribute to the river—find a berth on the wooden ferry. They also find the operators of the ferry, the sad survivors who can share the tale of the natural disasters that destroyed the two villages and fort that once stood here, and learn why they remain to tend to the dead.