People were talking downstairs about libraries and getting library books in rural areas. Two apps you can use to borrow ebooks (maybe not everywhere, YMMV) are Hoopla and Libby. You need to have a bricks-and-mortar library card to use them, and I see no rhyme or reason in what they do or don’t have, but it’s worth checking if you’re looking for something in particular. (Libby also transfers borrowed materials to a Kindle if you want.)