Harry Potter Cover Revealed!

Note the CURTAINS on either side of the full dust jacket? And there were curtains on the dust jacket for Sorcerer's Stone as well, but no other book. The beginning and the ending. We wondered if the curtains on book 7 could be the curtain Sirius fell through?

Also.....do Harry and Voldemort look as though they are fighting against something together? They aren't facing each other, like they are battling each other, in this picture? And Harry's eyes are focused somewhere outside the picture, not at Voldemort.