A bit of spooky-sci-fi entertainment for Friday night. This story is a landmark: not only is the writing almost eerie-flawless and the tale an even-more-brilliant extension of the author’s groundbreaking “Black Destroyer,” but it’s the clear originator of the “alien monster on a spaceship” concept that would become Alien decades later.
PS: I should clarify: certainly “Black Destroyer” is the first “alien monster on a spaceship” fiction. But the problem is that the Black Destroyer looks like a deadly monster and no matter how sweet-puddy-tat he acted, it seems dubious that the crew would get such a creature on board with them. Xtl is a hidden agent, undetectable until he’s on the ship, and therefore much, much more dangerous.