This is awesome! I dug up my old 2nd gen Kindle in the hopes of following along, and sadly the battery is busted :(
Instead, I'm currently in the process of making a macOS screen saver to replicate this!
I'm blogging my updates at http://jamesliu.io/posts/macos-screensaver/
GitHub repo: https://github.com/disposedtrolley/literary-screensaver