Above all, your NOOK is an eReader, so you’ll likely want to find books to transfer to it. One of the simplest ways is to check with your local library. Many libraries have programs that lend out books in the EPUB format that the NOOK uses. (For details, see SD Cards and Your Library.)
Some websites of local bookstores sell eBooks in the EPUB format. Check with your local stores to see if it does.
When you find eBooks online in the EPUB format, you want to make sure that they can legally be distributed for free. The best way to do that is to go to a reputable website known for distributing free books without copyright violations. The best one is Project Gutenberg (www.gutenberg.org).
Keep in mind that if you’re looking for free eBooks, the NOOK Store (Browsing and Searching for Books in the NOOK Store) is an excellent place to look, because you’ll find many high-quality free books there. When you get free eBooks from the NOOK Store, you won’t have to download them to your PC and then transfer them to your NOOK. They’re downloaded straight to your Library.