@BigMikey Project Gutenberg has over 70k Free books. Multiple formats offered for downloads. (even some in audio) Classics and older books available ones that are out of copywrite or published as free/pub domain. Lots of banned books are there as well.
https://www.gutenberg.org/
@Lucky188 I am a huge fan of PG, they do amazing work. One day I will have to try their audio books.