Smug Spongebob Kindle Wallpapers

How to use:

First, go to your Kindle's settings, click into 'Screen and brightness' and make sure you turn on 'Show covers on lock screen'.

Next, when you've downloaded your wallpaper, use Amazon's Sent to Kindle feature to upload the epub file to your Kindle library.

Now whenever you want your wallpaper to display on your lock screen, simply click into the wallpaper's "book" before turning off your screen.