The Invisible Enemy

First published in Imaginative Tales in September 1955, this science fiction story follows computer expert Harley Allison aboard a spacecraft investigating the disappearance of earlier expeditions to a dangerous alien planet. While the commander and crew struggle to understand the mysterious threat, Allison relies on scientific reasoning and computer analysis to uncover what is killing the explorers. The story builds suspense through an unseen enemy, human conflict, and the dangers of exploring unknown worlds.