Alvin! Theodore! Take cover! In the recent eco-disaster film "The Day After Tomorrow," as a new ice age rapidly envelops the United States, roughly half the population scurries in panic to warmer climes in Mexico.
Drawing clues from the covers The clues are in the cover. Or so goes the chatter on HP Web sites. The cover on all three editions of Harry Potter and the Half-Blood Prince- the U.S. edition from Scholastic, the U.K. edition from Bloomsbury and the deluxe edition - seem to emphasize th