Well, since no one guessed the answer in my last post, I'll give you another hint. It's a picture book.
And to repeat what started this little contest, I had a customer recently who came up to me with this conundrum:
"I'm looking for that kids' book. You know the one I mean."
and oddly enough I did know the one she meant. If you're the first person to guess which book it was, you'll win a prize (your choice of certain ARCs for Spring 2010).