Specifically, Frank Frazetta paintings. I had a paperback reprint of some of the old Creepy yarns and, well, check out the cover image:
Or at least the most prominent cover image - as I recall (twenty years on) this was a fairly busy bit of graphic design. The important part was really the fact that this image freaked me the hell out, and that it was entirely because of that crazy looking werewolf. Even by the standards of the supernaturally cursed, that thing does not look right. (The story referenced is one of the very best, though. For the record)
The back cover, or possibly the lower half of the front cover (twenty years, remember?) featured a few more covers, and they were almost as bad. Take this one:
Frank Frazetta is the only person ever to manage to make a caveman look frightening to me. It's remotely possible that this is because I saw Encino Man at a relatively young age, but I don't think that this in any way detracts from the accomplishment.
This here was the one that broke young Johnathan. Pubescence was rearing its horrific, spotty head and whispering things about how interesting the character in the foreground might potentially be, while general childhood terror was pointing out that the gorilla head and the colours were profoundly wrong. In retrospect I have to blame this image for my not retaining the collection over the years. Brrr. And also yowza.
Tomorrow: more Frazetta!