What if the person was simply serving those files for himself over the internet (I've done it countless times) and Google caught it because the author was careless with handling DNS entries? Now DO has an IP and an accusation, more power is given to the DMCA-strike-first-ask-later status quo, all for what? It's not child pornography we're talking about, it's books for Christ's sake. There's no harm, it does not affect your life, why go through the effort of bringing trouble to someone else because of your own lack of care with sensitive issues such as DNS entries?