A couple of hours after my last post about the battle over ebooks pricing, word emerged that Amazon and Macmillan had ended their feud. The day before, another giant publisher, the Hachette Book Group, joined Macmillan in switching to the "agency model" for ebooks. The New York Times says Harper Collins is planning the same move. Details of the Macmillan-Amazon peace treaty aren't public, but it certainly does appear that publishers have broken Amazon's control over ebook prices.