[unregisturd]

Codebook: I assume you've joined the Fighter's Guild, because you are doing this quest. Now, if you're also in the Thieve's Guild, you can finish all those quests and become Master Thief, and that eliminates a lot of the Fighter's Guild quests, including having to get the codebook. (It explains why you don't have to do them once you finish them. Something about the Fighter's Guild being corrupt or something.) If you don't want to join the Thieve's, I don't see why you couldn't bribe the lady to give it to you, or admire/taunt/intimidate. You say you have a good Personality? Those should all work.

Chimraverradim: (I don't know the name either, that's just the closest thing I remember it being.) Isn't this book locked up in the chest in the lady's closet? I so, just got a lockpick or "open" spell, but you're going to have to unlock level 70 or something. I don't quite remember. I did this quest a long time ago. And, once again, I could be thinking of a totally different quest. Anyways, check in the chest. Isn't it supposed to be in there? (Don't let the lady see you, though, because you will then be expelled from the Mage's Guild.)