Covers from BORIS KARLOFF TALES OF MYSTERY:
The really neat thing, looking back on them now is the painted covers, a fairly common practice at Gold Key in these days and Dell before it. These images just dare the potential reader to open it up. I mean, what the heck is going on on these covers is just too interesting to ignore!
Images from, a great site for some nifty cover art: http://www.coverbrowser.com/