Amazon Drops Macmillan Books Briefly in Pricing Spat shocked the publishing world when it pulled both the digital and physical books of Macmillan, the large international publisher, after Macmillan said it planned to begin setting higher prices for its e-books. But in a message to its customers posted to its Web site, Amazon said that while it strongly disagreed with Macmillan’s stance, it would concede to the publisher.