From Friday's PWeekly.com:
"Plans by independent booksellers to buy the 10 November titles being offered at steep discounts by Wal-Mart, Target and Amazon have been foiled by the big box retailers who are limiting the number of books one customer can buy. According to the Wall Street Journal, Wal-Mart is limiting purchases to two copies per customer, Amazon has a three-copy limit and Target five.
There has been lots of discussion in bookseller forums about buying quantities of titles at the big box retailers as a protest to the discounting policies, but also as way to get a better margin since the 10 books would be cheaper to buy from the stores than from the publishers."
Europe, by the way, doesn't have these pricing battles, reports the Wall Street Journal, because "most major publishing markets, with the exception of the U.K., are bolstered by laws requiring all bookstores, online retailers included, to sell books at prices set in stone by their publishers."