From the B&N FAQ site on buying Nookbooks:
In general, purchasing NOOKbooks at Barnes & Noble is as easy as clicking a mouse. That's because NOOKbooks are available to you as soon as you click the "Buy Now" button on a NOOKbook page. Once you click that button, you can go to "My NOOK Library" and transfer your purchase to your iPhone, Blackberry or computer.
To make that purchase, however, you must set up a default credit card in your account. If you don't have an account, don't worry. After you click "Buy Now," you'll be asked to create an account. If you have an account, but don't have a default credit card, you'll be asked to select a credit card or enter a new one. Either way, complete your purchase only takes a matter of seconds that first time. And after that, it's almost instantaneous. Learn more about NOOKbooks at BN.com.
Your purchases have a download button in your library on the B&N website, so I would think you should absolutely be able to download it to your PC and then sideload it onto your NC using either ADE or Calibre.
Last edited by leday; 12-28-2010 at 08:25 PM.