Synopsis
The worst part about having an alien enemy is that you can’t always be sure whether it’s an enemy—especially if you can’t find it.
History
First publication: Galaxy, June 1953
Review
Containing the theme of questioning reality. How do you know thta something is really what you think it is? This time involving an alien life form that can imitate inanimate objects. Do you really know that your stapler is really a stapler? This is the sort of thing PKD did best. A very good story and recommended.
Videos
We have the story in these editions:
Paycheck and Other Classic Stories, trade paperback, Citadel/Kensington, 2003-09-00
The Best of Philip K. Dick, paperback, Del Rey Books, 1977-03-00