I just came across this Kindle e-book on Amazon:
Prince Harry's Field Guide to Surviving the Royal Wedding is an "advanced training manual to any of your royal princes out there who think you have what it takes to have your features stuck on a commemorative mug… And what's more, it's an ebook so you know that no owls were harmed in the production of this guide. That's right: I bagged them all before I put pen to paper!"
If you have a Kindle and a penchant for jokes about Prince Harry, you might want to check this out. (And post a message here to let us all know what you think of it!)
That has to be a contender for best royal book cover of the year.