In Pictures: Half-Blood Prince covers

1 of 6 Here is the children's UK cover of Harry Potter and the Half-Blood Prince

2 of 6 And this is what appears on the back of the cover - mysterious, isn't it?

3 of 6 And this is the adult UK version

4 of 6 And here is the cover you'll have if you have a US copy of the book

5 of 6 The US deluxe cover of the book has another cover, which according to the publishers, shows "layers of mystery unfold in a forested glen, where we find Harry Potter and Dumbledore peering through dense branches"

6 of 6 The back cover of the US version shows Ron and Hermione looking up at Voldemort's Dark Mark. Copyright Scholastic