Libby is an online library, so you can borrow books from them. They also have audio books. All you need is a library card (which iirc you can sign up through libby).

You can read the books in the libby app itself (not bad, maybe a little clunky) or if you use something like a Kindle, you can have it sent to that, and read like normal. I believe it does others than kindle, but that’s what I use, so that’s all i know.