Ghostly Haunts #28

Speleologists Henri and Jean, longtime friends, become wealthy after discovering valuable minerals in caverns throughout Europe. Unbeknownst to them, they are under observation by the creatures who dwell beneath the surface. Their friendship is strained when Inger (whom they both courted) marries Jean. While exploring the Harz mountains, Henri and Jean find humor in their failed attempts to murder each other and resolidify their friendship. Unfortunately the subterranean creatures have cut their lines to the surface.