De-register Your Device:If your Kindle device or app is registered to a UK Amazon account, you will need to de-register it. You've heard that selfpublishing for Amazon's Kindle is a breeze, so you go to their website and click "submit.That's usually when the option to purchase kindle books is missing or greyed out. I just published my debut ebook on Kindle, but I'm currently experiencing an issue. Use the Kindle Store to purchase books for your app. The reserves service provides access to curriculum materials that are in addition to required textbooks. For students: Access course reserves. Kindly check if the software is up to date . Open the Settings menu on your Fire tablet and select Device Options. The library offers free eBooks, eAudiobooks and eMagazines through Libby.