Do Panic. They're coming ...

Skulduggery and Valkyrie are back in the third part of the ingenious series by author Derek Landy!
And Because I think the blurb on the book sums it up just too well, I'll just quote it for you:

You've seen it all before. Some bad guy wants to bring about the end of the world, and skulduggery and Valkyrie fight valiantly to stop it happening. A few people get hurt, sure, but everything's all right in the end.
Well, not this time.
(Blurb on the book)

That's about everything I have to say. Except one thing: go and buy the book if you want to know how the story evolves this time. And how it ends.