. >> reporter: click to amazon to order james patterson's best seller or to preorder j.k. rouling's novel. and amazon is not making it easy and not offering its typical discounts, saying delivery times are two to four weeks instead of overnight and it isn't taking preorders. saying it is unavailable. >> amazon wants to keep the discount level where it is, pub learners are concerned about this because amazon has a tendency to deeply discount ebooks much further than the price of the print books are. if that happens, publishers are worried it will put too much pleasure on retail book stores and you might start seeing more retail book stores starting to close. >> reporter: amazon won't comment. they say they will spare no effort to resume normal business relations with amazon, but under terms that appropriately value the author and publisher. >> the stakes are high because amazon controls more than a third of total book sales and over 60% of ebook sales. amazon not a similar battle with publisher mcmillan in 2010, removing the buy buttons before agreeing to raise ebooks for sellers. au