FYI if you're an eBook person like me. I formatted a few hundred screensavers for my Kindle Paperwhite and posted them here: http://imgur.com/a/DyXBi Your device must be jailbroken.
You'll also have to change the size to fit your device. Unless you have a Paperwhite 3. If so, then the size is appropriate. You can also get to them via reddit here:
https://www.reddit.com/r/kindlescreensavers/
Enjoy