From Azkaban to Hogwarts

There are four houses at Hogwarts. This is common knowledge. So, starting off in Azkaban isn’t that strange, right? *** Soon after William opened his eyes, he found himself in Azkaban. Soon after a prisoner named Mundungus was released from prison, something strange happened. A unique job fair was suddenly held? “What, Hogwarts is recruiting professors?” “Come to Azkaban?” “Professor of Defense Against the Dark Arts?”