What Is E-Ink? How It Works & Why Every Ebook Fan Needs It

E-readers like the Amazon Kindle can only do one thing, but they do it very well: they make the reading of digital books as easy on the eyes as the reading of paper books. They have screens that look just like paper, viewable from any angle, viewable even in direct sunlight, and battery life measured in weeks. Check this article from MakeUseOf.com