or twelve long years, the dread fortress
of Azkaban held an infamous prisoner named Sirius Black.
Convicted of killing thirteen people with a single curse, he
was said to be the heir apparent to the Dark Lord, Voldemort.
Now he has escaped, leaving only two clues as to where he
might be headed: Harry Potter's defeat of You-Know-Who was
Black's downfall as well. And the Azkaban guards heard Black
muttering in his sleep, "He's at Hogwarts... he's at
Hogwarts." Harry Potter isn't safe, not even within the walls
of his magical school, surrounded by his friends. Because on
top of it all, there may well be a traitor in their midst.
