If you have a library close to you check with them for e-books. Not as big of a selection as you'll get on Amazon, but you can download a lot for free. A good Sci-Fi series I started was Johannes Cabal by Jonathan L Howard.
I work at a Library and we just recently moved into a brand new building that the community did years or fundraising for. We also recently expanded the days we are open and our hours. People love libraries where I live in CA. You can get all kinds or different media and it's free. I don't see them going away any time soon.