Amazon vs. B&N - battle joined

Item:

Barnes & Noble has told any of its stores that have stocked Penny Marshall’s My Mother Was Nuts to remove the book from shelves. B&N has a corporate policy to not carry physical copies of books acquired by Amazon Publishing in its stores . . .

Full (though brief) story here. Just to explain briefly, the ebook at present is only available for Kindle, which B&N doesn't particularly appreciate.