The Worshippers by Damon Knight, Science Fiction, Fantasy, Adventure

They went aboard the alien ship that had showed up at their hostel on the moon. Harriet and two other women, and six men counting the guide and Weaver. The ship was a red-lit cavern. The "crewman" turned out to be a hairy horror, a three-foot headless lump shaped like an eggplant, supported by four splayed legs and with an indefinite number of tentacles wriggling below the stalked eyes.

"They're more like us than you'd think," said the guide. "They're mammals, they have a nervous organizatio...