Harry Potter and the Prisoner of Azkaban by J.K. Rowling (Science Fiction/Fantasy/Ages 9-12)
Harry Potter and the Prisoner of Azkaban

This is a great book about Harry Potter in his 3 year at hogwarts but there is a murderer on the lose he escaped from askaban and is hunting for Harry.But there is a twist in the story read the book to find out what happens.