The Amazon digital book juggernaut seems unstoppable at the moment and looks like it would chew up anything and everything that comes its way. It did so with the hardcover books back in July 2010 and now the latest victim is paperbacks. "Kindle books have now overtaken paperback books as the most popular format on Amazon.com," as per the company earning release. The date was … [Read more...] about Amazon sells more digital books than paperbacks