The 21st century has ushered in the information age and certainly yielded a wondrous bonanza of publications, sound tracks and videos many of which are free along with all the computer programs you will need to make them usable on your digital devices.
Kindle for PC free from Amazon books http://www.amazon.com/gp/feature.html/ref=kcp_pc_mkt_lnd?docId=1000426311
Customers can check out a Kindle book online through a U.S. library and read it on the free Kindle for PC app.
Free eBook Collections
These books can be read on many devices and in many formats. There are over 2 million titles to choose from. Amazon provides a list of many good sources for eBooks.
Adobe Digital Editions
Sample eBook library http://www.adobe.com/products/digitaleditions/library/
Check out the Adobe Digital Editions Library, where you can browse and download free eBooks and digital magazines, including full-length novels and works of nonfiction. With a membership in a U.S. library, you can check out online many eBooks and read them in the Adobe Digital Editions reader.
Nook from Barnes and Noble
Download the Free NOOK app for PC. Over a million eBooks, newspapers, magazines, and thousands of free eBooks just a touch away.
Project Gutenberg has 36000 free eBooks for Kindle, Android, iPad, iPhone.
iBooks; If you have an Apple device such as iPad or iPod, you may download through the iBook store many free books. (You MUST have their device.)
Calibre - eBook mangement
Calibre is a free and open source e-book library management application developed by users of e-books for users of e-books.
Audio books - Free
You can download free audio books from these sites and listen via your computer or transfer to an mp3 device.
With a membership in a library in the U.S., you can borrow and download audio books.