From the paperback collection of yours truly, here are three covers with art by Stephen Miller, produced for a simultaneous six-volume reprint series of works by the great SF author, William Tenn, published by Ballantine Science Fiction back in 1968:
[CLICK IMAGES TO ENLARGE]
The other three books in the series have covers by Stephen Miller that are as good as — and in at least one instance, perhaps two, significantly better than — the covers I’ve posted above. Unfortunately, I don’t own those ones, but you can easily find scans of them on flickr if you’re interested.
Keywords:Of Men and Monsters, Of All Possible Worlds, The Square Root of Man.