I recently subscribed to Kindle Unlimited in which you pay $9.99 per month and recieve unlimited books. You can't read any book you want, but they have a large selection of free books under the plan. Similar to Netflix, you can't watch anything you want but the selection is good enough to make it worth it.
One good things I've noticed is I read more now. I'd often be in the situation where I'd buy a book for 3-15 dollars and not enjoy it like I was hoping. Having paid for it I felt an obligation to keep reading through the whole thing. Or I'd feel like I needed to read it but not actually read it which caused me to delay buying another book which I might enjoy more. The great thing about having the flat monthly fee is if I select a book that turns out to be a dud, like a biography on Buckminster Fuller I recently downloaded, I have no guilt about not reading it if I don't like it. Instead I read something else at no more charge that makes me excited to get in bed every night so I can read my book.
This may sound like a commercial for Amazon but I really like this method of consuming books and I reccomend it to anyone.