https://consumerist.com/2017/08/08/amazon-tells-third-party-booksellers-to-speed-up-deliveries/ >That paperback book you ordered from Amazon for your upcoming beach vacation might just arrive faster than you thought. But it’ll come at a new cost for the third-party seller providing the title: Amazon is once again tightening the reins on sellers who don’t use the company’s fulfillment services, reducing their required delivery window. >Just days after Amazon changed the way returns work for third-party merchants — bringing the experience more in line with Prime services — CNBC reports the e-commerce giant is making a similar change to the way the sellers who fulfill their own book, CD, and DVD orders deliver the goods.