223 J. K. Rowling http://ecx.images-amazon.com/images/I/51GC04ES2JL._SX80_.jpg 9 Harry Potter has to sneak back to Hogwarts, after accidentally inflating his horrible Aunt Marge. But once there everyone is whispering about a prizoner who has escaped from the famous wizard prizon, Azkaban. His name is Sirius Black, and as a follower of Lord Voldemort he is determined to track Harry Potter down -- even if it means laying siege to the very walls of Hogwarts! 14953