If you’ve read HPL’s “Supernatural Horror in Literature” you’ve seen his remarks on, say, Edward Lucas White’s story “Lukundoo.” If you then thought, Hey, I’d like to read that story, and googled it, you probably wound up at HorrorMasters, a site with a vast library of classic horror, novels as well as short fiction, all free, readable online or downloadable. There’s new fiction, too, but for me the best thing about the site is the availability of hundreds of older works, including many that cannot be found at Project Gutenberg or Google Books. It’s a priceless resource.
If you haven’t checked out HorrorMasters, give it a try. “Lukundoo” isn’t a bad place to start.