The SCHS Library has more than 60 books available as audio books. You can download these to you device by logging in to Destiny. Remember, you are only checking the book out. It will be returned automatically at the end of your circulation period so another student can use it. These are mostly older classics and are very well done.
There are also many other titles available for your use free of charge from other sites. Check out these options which offer books in the public domain: