There is a door at the end of a silent corridor. And it's haunting Harry Potter's dreams. Why else would he be waking in the middle of the night, screaming in terror? It's not just the upcoming O.W.L. exams; a new teacher with a personality like poisoned honey; a venomous, disgruntled house-elf; or even the growing threat of He-Who-Must-Not-Be-Named. Now Harry Potter is faced with the unreliability of the very government of the magical world and the...