Harry Potter and the Prisoner of Azkaban

In this story, Harry and his friends hear that someone wants to kill Harry. In that year in Hogwarts a new teacher comes in called Lupin. Soon they figure out that Lupin is Harry's dad's friend. But soon a prisoner breaks out of Azkaban (a prison that hasn't ever had a person break out). And that person is after Harry. I liked this book because it was cool. I didn't dislike it.