Just ordered it from Amazon. At the same time checked out Dreadful Sanctuary and found this review: "I am a fan of Eric Frank Russell's stories. This was one of his best in the magazine version. Unfortunately, for some unknown reason, he rewrote the ending for the book version, and he spoiled the story. I recommend that you try to find the magazine version -- you'll like it. And you will be surprised by its clever ending. (I would give the magazine version 5 stars.)"