Back when I initially received my NT as a gift, I purchased several e-books. One of them was free. It was called "Leviathan's Wake," and it was written by James S.A. Corey (a pen name). I finally got around to reading the book in early February, and I liked it. I went out to the B&N Shop and learned that the next book in this series would be called "Caliban's War," and it would be available in June of 2012. I pre-ordered it, and paid (in advance) for the e-book.
I also noticed that a prequel was available from the same author called "The Butcher of Anderson Station," so I bought it for the price of $1.99. I just got around to beginning that book yesterday. Imagine my surprise to find that my $1.99 bought me the first chapter (26 pages) of "The Butcher of Anderson Station" and the first chapter of "Leviathan's Wake" (11 pages).
I called B&N Customer Service, and after the typical questions and assertions over whether I really understood how to use my NOOK Tablet, the CS rep finally consulted his superiors and received approval for a refund of my $1.99. In the meantime, they will contact the publisher about the issue, and I was advised to call B&N Customer Service in about a week or two to find out if the error had been corrected before reordering the book. In the meantime, be aware that this "e-book" appears to really be nothing more than a "peek" at the first chapters of these two books, and should be free.
I had not, yet, turned on my computer for the day, so I tried to use the NT to access the B&N Web site to look at my order history. That was a mistake. Either the Web site is defective, or the conversion of Web pages to "tablet format" does not work very well (which appears to be the case, in any event). It's a good thing that I use my NT, primarily, for reading because it leaves a lot to be desired as a tablet. In my case, it is certain that tablet computing will never replace my trusty desktop. 
Update:
As instructed by B&N Customer Service, I called them on the telephone before re-ordering this NOOK book today. CS confirmed that this is not the only e-book with which B&N is currently experiencing problems. Apparently, there are a number of books that customers are paying for, and are not really receiving all of the pages for.
B&N Management is working on the problem, and I was instructed to call back after an additional 24 hours. 
