Duplicity — Ian Woodhead

The cavern dwelling hunters have tracked down their missing tribe and their chameleonic forms shifted to match the two runaways. Henry Collins loves his wife. His job pays the bills and the mortgage. Henry's content with his life. Henry and his wife died on a caving holiday 6 months ago. The creatures who replaced them took their form and their memories. They BECAME the humans they ate. Their town is about to become a killing ground.