Mostly because I was born in it, *cough*
But having "OotP" movie and BOOK 7 (eeee) in it as well doesn't, uhm, hurt.
Yeah, I don't know why so many people are upset that "it's too soon" or "it's too close to the movie". WHUT. HP MONTH OF AWESOME, EVERYONE. 7th month of 7th year.