According to the Wall Street Journal, the online retailer is also developing a solar-charged Kindle case.

The company's chief executive tweeted that the latest version of the reading device is ready and details could be expected next week. Of course he did not mention what Amazon was doing and how much hit cost. The Journal got on the blower to its deep throats and asked.

Amazon appears to think there is money in the higher-end market. After all, the Surface is doing rather well. Although since it is still going to be a Kindle it is just going to be a white screen with more bells and whistles and a rechargeable case.