I got the idea to go to Cover Browser to see how comic book covers would scale to an eInk screen.
Well, the JPEGs there must be enlarged a bit and then they are actually too narrow for 600px wide. So I had to back it with gray and then trim. Then convert to grayscale.
See the result of Captain America #1 after the break.
Then I got the idea to see about classic TV Guide covers. Yeah, I know, practically a heresy, but still.
Well, most need a bit of enlargement too and they also turn out to be too narrow and need backing with gray as well.
Two experiments follow.
This first one is obviously a scan of an issue when it had center folded stapling. The left edge curve is obvious.
I would have bet the next one had the same kind of binding — not the squared glue binding that came later — and yet the original image was perfectly flat and aligned.
Bob Peak always did the best damn covers.
Magazine covers scale the best, although some need 3-8px of side trimming to make them edge-to-edge:
Go forth and make your own!