I also wanted just a list of the collection, but it looks like the 'best' list is the list of (just HTML) repositories in their github org: https://github.com/s

I also wanted just a list of the collection, but it looks like the 'best' list is the list of (just HTML) repositories in their github org: https://github.com/standardebooks?q=&type=&language=html https://github.com/standardebooks?q=&type=&language=html It would be great to just index whatever metadata is available and provide search facets on those fields. It looks like there's quite a lot of metadata in just the few that I cherry-picked: https://github.com/standardebooks/p-g-wodehouse_right-ho-jeeves/blob/master/src/epub/content.opf https://github.com/standardebooks/p-g-wodehouse_right-ho-jee... Looks like at least some of that already works, since you can sort by the "se:reading-ease.flesch" field on the web site.