Since the books are available on the site as text and HTML the search engines index them already for you. Try searching for the below; it should take you to the book you expect as the first result:
And as another person noted, the vast majority of books have HTML, EPUB, Mobi formats. We are also looking at both KEPUB (Kobo) and PDF which will probably come in the future.
As another commenter said PG is almost all books from 95+ years in the past due to copyright law in the US. We partner with a sister organization, the World Library Foundation, who have a self-publishing portal for modern works by authors who wish to put their own work in the public domain. You might want to look there for more modern material. https://self.gutenberg.org
OCR has improved a lot since then, but OCR is just step 1 of reading in text. They make a lot of errors (even now, especially on old worn out paper pages) and even if they didn't, one has to format the book, deal with footnotes, sidenotes, illustrations, etc. DP is very active, we will welcome you back with open arms :)
Worse than that - even if they would take action, you can't possibly orchestrate filing all of the complaints. It's a drown-in-quicksand problem, you can't fight quicksand one grain at a time.
> you can't possibly orchestrate filing all of the complaints
To the ISPs? Each IP range has an abuse email address registered and this is specifically exempt from rate limiting at RIPE's WHOIS server. Not sure how it is in other RIRs but I just happen to know of this policy
You can automate the whole thing, provided that you have a reliable way of identifying the undesired traffic which you need anyway for being able to block it by any means. The trouble is in user identification (they'll just use a new IP address from that ISP or hosting provider if you don't tell the provider about the problematic user)
See what I wrote above (and let me say I am talking about Project Gutenberg and Distributed Proofreaders here, I am one of the admins on both). A large amount of the hassle traffic we've seen is as I wrote above, the IPs come from everywhere and in many cases, each IP makes a single request and doesn't come back. They change user-agent dynamically, etc, to masquerade as regular traffic. They come from residential, cloud/hyperscale, corporate, educational, government, all the networks, on every continent. This is many thousands of "open a ticket with someone" events per hour territory. It's as difficult to fight as DDoS itself for the same reasons (presumably the harvesting parties know that and that's exactly why this approach is used).
Others online have been writing about their own experience with the same stuff; it's not unique to PG at all, it's everywhere. Talk to anyone that runs a web server and they'll have these stories...
I'm aware, I also host various websites that see an IP do a single request to the most unlikely of deep pages. Usually not hard to correlate with similar surprising requests from the same ISP, though, and that's exactly why it would be useful to talk to them: they know who used that IP address at the given timestamp. If they get a hundred complaints from different websites, the ISP is in the unique position to correlate that and find the subscriber(s) that are problematic
You also don't have to send out 1k support requests per hour. Could trial it with some hosting provider that you expect is responsive and see how it works out
edit: like, I just don't see another solution short of banning being anonymous online. Each site would have to know who you are. Someone has to be able to track it back to a person that is doing the abuse or there can't be any rules that we can apply. Imo it's better if that's the ISP (or VPN provider, say) who already has this information anyway
The ebook editions are very good for this. Most of the e-reader software provides all the amenities (bookmarks, highlighting, notes, control of margins, etc).
site:gutenberg.org "it was the best of times"