Yes, there are. Project Gutenberg is a great free option. It has thousands of classic novels that are in the public domain. You can easily download and read them on your device.
One option could be Wattpad. It has a vast collection of novels in various genres, from romance to mystery. Another is Goodreads. Although it's mainly a review and recommendation site, it can also lead you to places where you can read novels. Also, Project Gutenberg offers many classic novels for free.
One of the great ones for beginners is 'Doki Doki Literature Club'. It has an engaging story and simple gameplay mechanics that are easy to pick up. It also has a unique art style that draws players in.