There are a lot of scanned books on the Internet Archive, though the OCR quality is pretty bad, and now there are the possible copyright issues of training on a

There are a lot of scanned books on the Internet Archive, though the OCR quality is pretty bad, and now there are the possible copyright issues of training on any still-in-copyright works. I'd expect any SETI-like project on libgen/sci-hub would have to be somewhat hush hush. It wouldn't surprise me if it's already being done by somebody evil, who will use the results for their own nefarious purposes and not release them.