Kindle offers the largest selection of the most popular books people want to read. Customers can choose from over 435,000 books, including New Releases and 81 of 100 Nielsen UK Bestsellers. No other e-bookstore in the UK offers this many books or bestsellers. Over 1 million free books are also available to read on Kindle. Kindle lets you Buy Once, Read Everywhere-on Kindle, Kindle 3G, Kindle DX, iPad, iPod touch, iPhone, Mac, PC and Android-based devices. Amazon's Whispersync technology syncs your place across devices, so you can pick up where you left off. With Kindle Worry-Free Archive, books you purchase from the Amazon.co.uk Kindle Store are automatically backed up online in your Kindle library on Amazon.co.uk where they can be re-downloaded wirelessly for free, anytime.