There is a door at the end of silent corridor. And haunting Harry Potter?s dreams. Why would he be waking in the middle of the night, screaming in terror? Here are just a few things on Harry?s mind: A Defense Against the Dark Arts teacher with a personality like poisoned honey.A venemous, disgruntled house-elf Ron keeper of the Gryffindor Quiddtch teamThe looming terror of the end-of-term Ordinary Wizarding Level exams...