Though I’m still deeply undecided about whether to self-pub or shop around my first novel (hooray, I’m still editing, so I’ve got plenty of time!), I found this post about using public domain artwork to help you design your own book cover using public domain artwork.
The writer, and amateur designer, Casey Dexter turned to reddit for feedback. By far the funniest interaction on that thread:
Everyone’s a critic, eh? Haha. To the right, you can see his results.