I've gotten past the trick bridge and into the library. Where is the Lich? I've picked the lock on the Level 12 lock, but I can't get the door on the other side of the room to open. I've been all over the rest of the castle that I can get to, and the only things I can't do are get through the door in the library, the one directly behind the Great Hall, and the Vault. Can anyone help me?

The lich is in the room behind the great hall, behind the door with the "strange music". You get a key from....uh, I don't remember where the key was....one of the underwater areas, I believe. the lock is REALLY hard to see, but its to the right of the door on the door border.

but if you've been everwhere else, you should have 2 keys: the elevator key from the maze, and another key that opens the Lich door. when you get in, he gives you a key (DO NOT KILL HIM, TALK TO HIM UNTIL HE GIVES YOU A TASK) that opens the other locked gate, which leads to a huge area...

I don't know about the other door in the library, I haven't been in there either.

Thanks for the help. Somehow I totally missed seeing that keyhole, and I'd been by there plenty. The door in the library is just a connecting door to the back of the Lich's rooms.