The Kindle Daily Deal, which drastically reduces the price on one Kindle book for a 24-hour period, featured on January 24 A Heart of Freedom by Chai Ling, cutting its price from $10.79 to $1.99. The book immediately jumped to the top of the paid Kindle charts, but what's more interesting is the book's staying power: as of January 25, the day after the deal with its price back up to $10.79, Ling's book is still at number four on the chart, showing that the Kindle Daily Deal helps a book for longer than a 24-hour window.