I actually really like these covers. I think they've got a good mix of light-hearted high school life and dead zombie to perfectly give off the kind of vibe that the story itself gives.
And then I saw the UK covers:
Here's the US cover of the third book, coming out in June of this year:
I couldn't find the UK version of this one, and it's entirely possible that they haven't finished designing it yet. I can't wait to see it though!
Which covers do you like better?