There are three ways to get books on the Nook. Directly using either a Wi-Fi connection or a 3G connection (that is FREE by the way), or use a computer to download content then move to the Nook via USB connection.
Download books in seconds.
Wi-Fi ( 802.11 b/g).
Free Wi-Fi in all Barnes & Noble stores.
Free Wi-Fi in all AT&T hotspots
NOOK 3G+Wi-Fi includes FREE wireless connectivity via AT&T, the nation's fastest 3G network - with no fees or contracts. *
Available now in over 190 U.S. cities, AT&T 3G Wireless service provides accelerated data speeds and data capabilities for an amazing wireless data experience.
Disclaimer: 3G network not available in all areas