Prices have come down, and the user experience has improved. By Jeff Bertolucci, Contributing Writer February 4, 2010 Hand-held electronic book readers -- better known as e-readers -- have finally caught on. Digitized books account for just 1.4% of book sales, but sales of e-readers themselves are expected to double in 2010, bringing the total number purchased to ten million. Amazon’s Kindle is the best-selling model, but Barnes & Noble’s Nook has generated a lot of buzz, and a new touch-screen version of the Sony Reader should be available by the time you read this. Even more e-readers will arrive in 2010: Several prototypes debuted at the Consumer Electronics Show, in January.An e-reader can store more than 1,000 books and can run for days between charges. The best e-readers have built-in wireless Web connections that make it easy to sample, download and buy books, as well as newspapers and magazines. Many New York Times bestsellers and other e-books cost $10 when purchased at Amazon.com or similar sites. If you stick to the $10 titles, you’ll pay about half what you’d pay for the wood-pulp versions. Kindle: Still the best. Amazon’s original Kindle met mixed reviews when it debuted in 2007. We found it innovative but were turned off by the $400 price tag. The improved Kindle 2 ($260), a somewhat slimmer model with a larger, sharper display and better navigation keys, arrived in 2009. Advertisement The Kindle’s Previous and Next buttons are handy for turning pages, but the computerized voice of the text-to-speech feature is grating. Sony: Too wired. The Sony Reader comes in three flavors: the $200 Pocket Edition, the $300 Touch Edition and the $400 Daily Edition (the Daily wasn’t available for review before this story went to press). The first two don’t quite match up to the competition. The main reason? Unlike the Kindle and the Nook, neither has a wireless connection. Rather, you buy e-books from Sony’s online bookstore via your PC and then use a cable to transfer titles to the Reader -- a clunky approach in today’s wireless world. The Touch Edition improves on the Pocket with a touch screen. But you navigate with a stylus -- so 2005. The Daily Edition does offer a wireless connection, which is a boon for e-reader fans who crave immediate gratification, but you’ll pay $100 more for the speed and convenience. Nook: Cool color. The Nook ($260) is Barnes & Noble’s first foray into the e-reader market. Its standout feature is a narrow, smart phone–like color touch screen below the main reading window. You can have the color display show navigation menus, thumbnails of books stored on the Nook, or a touch-screen keyboard. Advertisement Unlike the Amazon system, Barnes & Noble’s device lets you “lend” e-books to fellow Nook owners, as well as to users of some Windows, Mac and iPhone e-reader applications. However, the e-book files you lend expire after two weeks. And you can lend each e-book only once. The Nook’s two-screen approach works better in theory than in practice. Hopping between displays for basic tasks can prove tedious after a while.