"The Kindle app is optimized for the iPad, iPhone, and iPod touch, giving users the ability to read Kindle books, newspapers, magazines, textbooks and PDFs on a beautiful, easy-to-use interface. You’ll have access to over 1,000,000* books in the Kindle Store plus hundreds* of newspapers and magazines. Amazon Whispersync automatically syncs your last page read, bookmarks, notes, and highlights across devices (including Kindle), so you can pick up your book where you left off on another device. Get the best reading experience available on your iPad, iPhone, and iPod touch: • Shop the Kindle Store by visiting Amazon for the largest selection of books people want to read: over a million books, including over 800,000 at $9.99 or less. • Get free book samples – read the first chapter free before you decide to buy. • Read hundreds* of newspapers and magazines including The Economist, Reader’s Digest, Martha Stewart Living, and Food Network Magazine with high resolution color images. Visit the Kindle Store to subscribe to a newspaper or magazine and have each edition automatically delivered, or purchase individual issues. • Email PDFs & other documents to your new Send-to-Kindle e-mail address and we deliver them to your device. The documents are automatically archived in the Amazon Cloud and available for re-download on your iOS or supported Kindle devices. You can also read PDFs from Mail, Safari, or by transferring them from iTunes. • Customize your reading experience by choosing the background color, font size, and either portrait or landscape format. • Instant dictionary word lookup with 250,000 entries and definitions. Tap and hold a word to view the definition. • Search inside the book to find a character, topic, or section you want to revisit. • Simply tap on either side of the screen or flick to turn pages. • You can also read your Kindle books on your Kindle, Kindle Fire, Kindle Touch, PC, Mac, Android-based device, and Windows Phone 7-based device. Our Whispersync technology syncs your last page read, notes, bookmarks, and highlights across devices, so you can pick up where you left off."
This is a free app.