Amazon has been making the Kindle line of eInk ebook readers for several years now, and have come a long way since the first oddly shaped and hard to hold iteration.
On June 30th they started shipping their latest, the newest Paperwhite, and it makes another evolutionary jump towards becoming the best ebook platform imaginable. From speed improvements in screen refresh to enhancing the front lighting and reflectivity it is without a doubt the best eInk device on the market.
Slim, light, ridiculously long battery life and touchscreen navigation that is deceptively responsive given the inherent limitations of the screen technology combine to make this a must have if you aren't using a Kindle already, and worth a serious look even if you are.