USA Today is the latest paper to be sold through Amazon's Kindle. Amazon told Kindle subscribers they will be able to download the Dec. 26 edition for free. USA Today only offers weekday editions. The first issue for sale will be Dec. 29. The publication is the 21st U.S. paper and the 28th paper overall to show up in the Kindle store. The top five newspapers on Kindle sorted by bestselling: New York Times, Wall Street Journal, Washington Post, Financial Times, and Chicago Tribune.