Just after 6 p.m. on Friday, the weeklong standoff between Amazon (AMZN) and Big Six publisher Macmillan came to an end. Buy buttons were restored to print edtions of Atul Gawande's The Checklist Manifesto, Andrew Young's The Politician, and Kristin Hannah's Winter Garden, among other big titles. And by Sunday night, all of Macmillan's print and digital titles were available directly from the online retailer. "We are delighted to be back in business with Amazon," said Macmillan CEO John Sargent in a statement. Amazon has barely commented on the situation.