Perhaps not the very top level, but on the https://standardebooks.org/ebooks https://standardebooks.org/ebooks "Browse Ebooks" page, both `fiction` and `nonfict

Perhaps not the very top level, but on the https://standardebooks.org/ebooks https://standardebooks.org/ebooks "Browse Ebooks" page, both `fiction` and `nonfiction` are readily applied as filters. Easily done.