Exploring open-ended novels online feels like digging for hidden treasure—there are gems if you know where to look! Project Gutenberg is my go-to for classics like 'Frankenstein,' where ambiguity lingers long after the last page. Many indie authors also share experimental works on platforms like Wattpad or Archive of Our Own, though quality varies.
For something more contemporary, libraries often offer free digital loans via apps like Libby—I recently borrowed 'The Sense of an Ending' by Julian Barnes, which leaves room for interpretation. Just remember: 'free' might mean ad-supported or older titles, but the thrill of discovery is part of the fun!