If you've seen the movie Gentleman Broncos, the opening credits feature a montage of pulp sci-fi covers. You know the type - alien tentacles wrapping around an alarmed female astronaut while a crewman pulls out a blaster. You can actually see the brush strokes in the paint. I love it!
I started a Pinterest board collecting vintage sci-fi book covers. Although my intent was to find crazy 50s - 80s illustrations, I couldn't help but gravitating to all of the classic books that I loved. Clarke, Asimov, Pournelle, Niven, Pohl, Bester. So, at least the first round of pics are more nostalgia based than art, but I'll keep growing the list.
You can check it out on Pinterest, and follow me for updates.