It seems that Barnes and Noble is currently having website troubles. As in you can't actually get to any sales page for anyone's books, no matter who the writer is. Yes, they are knee deep in 404 "page not found" errors. That can't be good for business, can it?
[Update--the preceding was posted at 5 pm MST; and now at 9:30 pm, Barnes and Noble seems to have discovered and fixed the problem--whatever it was. Still one wonders how many sales they lost during the down time.]