You can start by checking out indie bookstores. They often have a curated selection of indie fiction. Also, websites like Goodreads have user - generated lists and reviews of indie fiction works. Another option is to follow indie publishers on social media, as they often promote their new and best works.
To find the best indie fiction, first, explore online book communities. Reddit, for instance, has sub -reddits dedicated to indie fiction where enthusiasts share their favorite reads. Second, look for indie book awards. Winning books in these awards are usually of high quality. You can also try Kindle Unlimited if you have it, as it has a vast collection of indie books. Browse through the genres you like and check out the highly rated ones. Moreover, ask your librarian. They might be able to point you to some great indie fiction in the library's collection or give you advice on where to find them.