Cold Skin by Albert Sánchez Piñol
Set on a desolate island near the Antarctic Circle, the story follows a weather observer who arrives to replace his predecessor, only to discover the island is besieged by mysterious, amphibious creatures that emerge from the sea each night. As he joins forces with the island's only other inhabitant, a reclusive lighthouse keeper, the two men must navigate their own psychological battles and the relentless attacks from the creatures. The narrative explores themes of isolation, survival, and the thin line between humanity and monstrosity, as the protagonist grapples with the nature of fear and the unknown.