After authorization, the Nook appears as a new bookshelf in your Library in the left panel of Digital Editions. Simply drag and drop books from other bookshelves (All Items or Borrowed) by hovering over the nook bookshelf until it’s highlighted and the little red “x” turns into a green “+” sign
On the nook, there are two sections of My Library: My B&N Library and My Documents. Your downloads eBooks (and other files you sideload onto your nook) will appear in My Documents. After you transfer your eBooks to nook using Digital Editions, eject your nook. Select My Library, and then View My Documents. You may need to press Check for New Content to display the eBooks you just transferred.
In the Adobe Digital Editions Library, eBooks will display a banner in the upper right corner, which tells you how many days until they expire. At the end of the lending period, you will no longer be able to read the eBook, but it will appear in your Library until you delete it. To delete, select the eBook and click on the little arrow in the upper left corner to see the delete option on the menu.
The next time you connect your nook to your computer, it will sync with your Adobe Digital Editions Library to reflect the eBooks you have deleted, and they will also be deleted from your nook.