When sparring over terms with the publishing conglomerate Macmillan, it stripped the company’s books of the buttons that allow consumers to purchase them. In its dealings with Hachette, it delayed shipment of books. When cutting a deal with publishers, it doesn’t bother with innuendo. According to some who have sat across the table from Amazon, the company leaves no doubt that it will suppress a publisher’s performance in its algorithms and eliminate its books from its emails if the company rejects its terms.