Amazon has been a leader in the eBook reader space since it first introduced the Kindle eReader in November 2007. At that point in time, the Kindle had a 6-inch E Ink display that supported just four shades of gray, it included 250MB of storage that could accommodate about 200 eBooks, and it retailed for $399. For the first six months or so, Amazon couldn’t keep the device in stock — it was a smash hit. (more...)This post originally appeared on BGR: The Three Biggest Letters In Tech.com