If you buy books from Amazon, it going into your "cloud" and the kindle downloads them via WIFI. You can also load books in non-Amazon formats, like MOBI. If you are fan of the classics, you can download books for free from Project Gutenberg. http://www.gutenberg.org/ Amazon.com also has some free books. You can use email or a cable connection to move documents from your computer to the Kindle. I always load my driving directions onto my Fire when I go on dog show trips. I have a few photos and some music on mine, but don't use those features that much. I definitely have my dog's breed standard on it.