Sequel to The One Who Saved Harry

It's Harry's second year at Hogwarts, and things are getting intense. Harry finds a mysterious black book while wandering Hogwarts... and it writes back to him. Harry thinks he's found the perfect "person" to talk to about things he can't tell his friends, or even his adopted father. But then, things begin happening, and Harry finds himself in a situation he never dreamed would happen, and has no idea how to get out of it. Can Severus manage to stop the school from closing? Will Severus be able to get Harry out of trouble, and possibly save his life?