Have you heard of the Scribd app?
It's like Netflix for books and it's changing my life! For $8.99/month, you have unlimited access to audiobooks, E-books, and even sheet music (hear that, Liam?). No expensive purchasing of books (like Audible) and there are thousands and thousands of titles. I've been listening to Rosaria Butterfield's The Gospel Comes with a House Key and my kids love listening to The Magic Tree House series while Liam reads along. Scribd also has lots of the books - in E-book and audiobook form - that we'll be reading with Liam and Lanie's homeschool curriculum for next year.
If you download the app using this link, you'll get your first two months FREE and I'll get one month. Score. Give it a try! You can cancel anytime.