Well I think you can through your nook account if your nook is destroyed. Or do you mean let a friend borrow a book the answer is yes for most nook books.
the nook offers z wide selection of books from barnes and nobles book catalog. you can also find free books from Google books. you can import pdfs, and other non drom epub books. also you can not...
The Nook is an electronic book that holds digital books that you purchase and download. It is wireless and has excellent battery-life, (close to a month if I remember correctly), and can hold more...
I do not know about the other types, but on the nook simple touch, you make sure you are connected to WiFi, go to "n" button, shop, then search for the book you want or browse the shop. for further...