I am absolutely obsessed with this new Netflix animated series. I don't remember the last time I was so taken with a story to the point that I went back and watched it 7 or 8 times. Now I'm seeking out the inspirations and considering a crazy costume build.
My favorite so far is Sonnie's Edge, and you can find the short story on which it was based here. Although, I suggest you watch the flick first and see what kind of questions it makes you ask yourself. The short story is slightly different but also weaves more information into your understanding of it's message as well as it's tone.
I also found the whole series of triptych symbols and their corresponding tales at Redbubble created by moonfist.