There is a great app for your phone, tablet and computer that allows you to check out free books, audiobooks and videos. It is called Overdrive: https://www.overdrive.com/
You create a sign in then use your local library card to begin downloading borrowed digital and audio books. Northampton and Lehigh counties have many libraries to join if you need a membership card.
It is a great FREE service.... There are a few professional organizations that have online libraries as well.