There are also some community - driven reading platforms. These platforms often have users sharing and discussing various novels, and some of them might be free'red' novels. For example, Goodreads has a community where people recommend books. You can search through the recommendations and reviews to find free online novels that might be related to the'red' concept.
You can try some free e - book platforms like Project Gutenberg. Although it may not have all'red' novels (assuming'red' here might refer to a certain theme or genre), it has a vast collection of free public - domain books. Another option could be to search on websites that offer free indie novels, where you might stumble upon novels with relevant themes.