Harry Potter and the Prisoner of Azkaban - 3 by JK Rowling

The fortress of Azkaban has never lost a prisoner. Until now.

​For twelve years, the dreaded fortress held the infamous Sirius Black, a wizard convicted of killing thirteen people with a single curse. Now he has escaped, and rumors say he is coming for Harry.

Harry Potter is supposed to be safe at Hogwarts. But even within the castle walls, he isn't safe from the Dementors—the soul-sucking guards of Azkaban—or the dark secrets of his parents' past.

​Read the turning point of the series where the lines between friend and enemy blur.