These seem to be PDFs of books-gone-into-public-domain that are likely available in better ebook-style formats on gutenberg or similar. While I guess you were

These seem to be PDFs of books-gone-into-public-domain that are likely available in better ebook-style formats on gutenberg or similar. While I guess you were just going for driving traffic to your site via HN, is there anything else of actual value I missed?