Amazon unveils new Kindle, starting at $139

Amazon's third-generation Kindle is the sleekest and cheapest yet, with a Wi-Fi only version that starts at $139. The $189 version (3G+Wi-Fi) comes in either white or graphite

Just weeks after lowering the price of the Kindle e-book reader from $259 to $189, Amazon unveiled a fully revamped Kindle on Wednesday. It's sleeker, better looking, easier on the eyes — and starts at $139.

This new Kindle, Amazon's third generation, is smaller by 21 percent, and 15 percent lighter too. It has much improved contrast, 50 percent better than before, answering a significant complaint among dead-tree purists who compared the device's e-ink screen unfavorably to real paper. It's available in two colors: graphite and white.