Barnes & Noble Says It Won’t Sell Books Published by Amazon
mediadecoder.blogs.nytimes.com
mediadecoder.blogs.nytimes.com
And even if they don't want to sell Amazon's books, publicly announcing that fact seems unlikely to achieve anything.
I'm not saying it's the right decision, but it does have a strategy behind it.
On the other hand, their leverage is probably greater with ordinary books (as compared to comics). I presume they have a bigger slice of the book market and it wouldn't surprise me to find out that browsing-based sales are more important for books than comics.
I'd also say that the customer experience isn't as bad as it sounds. B&N will still special order the book for you and it will be sold at bn.com. With the exception of books by bestselling authors that B&N "should" have, I suspect most people aren't going to realize B&N has refused to stock the book. Instead, they're going to think that the particular B&N they're in doesn't happen to have a copy.
While it might be somewhat of a big deal for the authors involved, it probably won't be much of an issue for anyone else.
Seems like an appropriate response to me.