An e-reader also called as e-book reader or e-book device, it is a mobile electronic device that is designed for the purpose of reading digital e-books and other digital reading material.

The main advantages of e-readers are better readability of their screens, especially in bright sunlight environment, and it has longer battery life.

The Kindle e-reader from Amazon is a good e-reader and has got excellent reviews. The Kindle is sold Worldwide and many customers are very happy with the books from Amazon.

Kindle (good quality e-reader using E-ink) is among the best e-readers, like Sony, BeBook and Bookeen and using the E-ink technology reading on the Kindle does not strain your eyes.

The Kindle app is available for most major smartphones, tablets and computers. That means with the free Kindle reading apps, you can buy a Kindle book once, and read it on any device with the Kindle app installed*. You can also read that same Kindle book on a Kindle device if you own one. 

( *For iPhone and iPod, and iPad users:
Purchase Kindle eBooks at Amazon.com from any web browser and when you click to purchase, choose to have the eBooks sent wirelessly to your Kindle for iPad app.)