““It’s invisible because it’s a color beyond our range of sight. It must have stayed in here all these years. And it kills—it must—when its curiosity is satisfied.” Swiftly she described the scene in the cabin and the strange behavior of the gem pile which had betrayed the creature to her. Cliff did not return his blaster to its holder. “Any more of them on board, d’you think?” He didn’t look pleased at the prospect.””