As an example of how the public domain enhances public culture and discourse, I thought I would venture forth and see what was available. I chose Beyond Good and Evil by Friedrich Nietzsche because it is the drop off point for a large part of modern thought and was first published in 1886. It turns out you can:
Have it delivered daily to your email as a serial via Daily Lit
Download the audiobook version in MP3 format via LibriVox
Download etext version via Project Gutenberg
Download PDF at PlanetPDF
You can find the complete text in a few other places, but not as much as you would imagine. I did, however, manage to find 3 different english translations in the public domain allowing me to see the different way the translators view key concepts.
Filed under: Public Domain
