I’ve only had one complaint for a short story that turned out to still be copyrighted, otherwise it has been smooth sailing.

I’ve limited the stories on my website to 20,000 to keep to the theme of short stories.

Here are some of the classic sci fi novellas/novels over at standardebooks

https://standardebooks.org/ebooks/robert-louis-stevenson/the-strange-case-of-dr-jekyll-and-mr-hyde https://standardebooks.org/ebooks/mary-shelley/frankenstein https://standardebooks.org/ebooks/h-p-lovecraft/the-case-of-charles-dexter-ward https://standardebooks.org/ebooks/h-g-wells/the-time-machine