I have read a science fiction years ago. About aliens selecting humans on Earth and people trying hard to fit in their criterias in order to be the "chosen ones" and go away with the aliens.
But they don't know that aliens actually want to select them in order to exploit them for food consumption.
I might have messed up the plot a little, as I'm hardly remembering it. It might have been written by C. S. Lewis or Arthur C. Clarke or any other author similar to these.
Do you have guys have any clues what this book might be called?