Amazon has continued to build on the rousing success of its Kindle e-book
Reader platform, which Amazon has touted as the best-selling product in its history. It has continued to release iterations of the Kindle Fire HD, with the latest, the HDX 8.9-inch selling for $379, while the original Fire HD now sells for just $154. In September 2013, it introduced an all new version of the Kindle Paperwhite, with new higher contrast display technology, a 25% faster processor, a next generation built-in light, and new touch technology that allows the Kindle to respond more accurately. According to Amazon, it now sells more kindle books than all print books combined.