Cover art by Charles Copeland
As mentioned in this post Copeland is also responsible for the cover of the top book in the stack; and, as also mentioned in said post, had I realized the connection at the time it's likely the stack would have stacked in a slightly different order. But we're past that now.
Anywhoo, I learned from perusing the page(s) on the Lynn Munroe site Copeland's work can be seen on many other book covers, a smattering of movie posters, and inside the pages of assorted men's magazines of the '50s, 60s and 70s. Naturally I had to take a brief flip through our magazine archive to see if I could find any examples of the latter & my search turned up two, courtesy the April 1957 issue of Bachelor and the August 1970 issue of Men respectively:
(PS: Larger versions of these pages - and pretty much everything else posted here - can be found in our flickr photostream here.)