Shrunken Head?!?

I looked at the website for Harry Potter more this week as I bought tickets and became addicted to the hippogriff game. What the? Is it just me? I don't remember there being a shrunken head in that book. Or any book. I think I'll reread that book tonight/tomorrow a bit before the movie opens. Or, I can just wait til tomorrow evening to figure out wny my memory sucks. Or, maybe they are introducing peeves as a shrunken head? Time will tell!