My husband is a little bit of a techie and very much a book worm. He loved his Nook and now his Nook Color. He put all of this to great use and wrote a book on using the Nook/Nook Color. I hope you will check it out if you happen to have a Nook/NookColor or are in the market to get one.
Using NookColor and Nook by Patrick Kanouse
(Please note that the link that didn't work on the B&N site, noted by one reviewer, has been corrected by B&N as it was a result of their site.)