This article explains how to set a book cover as a screensaver for your Kindle, and how to upgrade your Kindle to unlock this feature.
How to Set a Book Cover as a Kindle Screensaver | Kindle Paperwhite Tip
If you’re tired of the default screensaver art, or just want to remind yourself what book you’re reading, you can set a book cover as your Kindle lock screen. If you have a Kindle with Special Offers, you can’t display a book cover as your screensaver. To access this feature, you’ll first need to pay an amount equal to the discount you received when you purchased a Kindle with Special Offers.
Tap the Kindle home screen at the top of the screen.
Tap the switch in the Show Cover section.
