The new low price for top-selling e-books changed everything. It tilted the playing field in the direction of digital, putting additional pressure on physical retailers, threatening independent bookstores, and giving Amazon even more market power. The publishers had seen over many years what Amazon did with this kind of additional leverage. It exacted more concessions and passed the savings on to customers in the form of lower prices and shipping discounts, which helped it amass even greater market share—and more negotiating leverage.