Entroponaut is just the GUI. The PDF reader and SATA-specific parts are separate.
I'll make the SATA project available at some point in the future. The PDF reader is a bit hacky and not as generic as I'd like it to be, but making a 100% generic PDF reader inside Ren'Py is more or less impossible. It needs to be cleaned up a bit before I release it. I'd rather have read from the EPUB document but Ren'Py's customized build of Python made that enough of a headache that it wasn't worth the time at the time.
Also, I won't distribute it with the PDF of the fan translation so you'll still need to find that yourself.