I’ve found some fantastic spots for free long reads. Project Gutenberg is a goldmine for classic novels—think 'Pride and Prejudice' or 'Moby Dick'—all free because they’re in the public domain. For more contemporary stuff, sites like Wattpad and Royal Road host tons of user-generated stories, from romance to sci-fi, with some hidden gems if you dig deep.
Another great option is ManyBooks, which curates free eBooks across genres, including modern indie titles. If you’re into fanfiction, Archive of Our Own (AO3) has endless stories based on your favorite shows, books, and games, all written by fans. Libraries also offer free digital loans through apps like Libby or OverDrive—just need a library card. Don’t overlook Medium’s long-form articles either; some writers publish serialized fiction there for free.