Whenever the subject of science fiction comes up I think of a short story I read many years ago that I wish I could find again.
It was in a paperback I bought somewhere back in the early 60's that had maybe 10 stories by different authors. The basic idea of the tale concerned people who "stepped" through invisible "windows or doors" into another dimension or parallel space that existed in the same time and place. It was a perfect explanation for why people often just disappeared without any trace. What I remember is that the main character stepped through and found himself in a world where people were used as slaves by wolf-like creatures. I don't remember much else and I would love to find it again.
I've spent countless hours online trying to track down the story and even purchased used books that had story titles suggesting a possible hit. I also posted on a couple sci-fi forums asking for any help but nothing. Sounds strange but it has haunted me for over 50 years.
Maybe I should write my own version and publish it, then the real copyright owner will come after me and it'll end my search.
