You'd think some art director would have noticed this trend by now...
Edison Cover
The Edison title cover fits its brief. It works because it connects two disparate ideas. The invention of the lightbulb and the retelling of the story of the inventor. It's very, very good and entirely memorable - unlike the others.
Re: Edison Cover
I feel like others beside Edison still work. Little Bee sold really well, so I'm guessing that was partly the cover. I like some of the ones with images inside the heads.