I came back to the sanctuary to find that Cicero had gone nuts and tried to kill everyone. I went to search his room but there was nothing there!
I tried re-loading the saves and everything, but nothing happened and it won't let me continue the quest!

Any ideas on how to fix this?


I've also had issues with bookcases eating books and never giving them back.

http://www.uesp.net/wiki/Skyrim:The_Cure_for_Madness

Are there no journals in the room?

setstage DB07 19 to skip the journal part I think.