[Radek]

1. Bad people. It's almost impossible because you will be forced to fight the rest of bad people at once in the end. Some of them can report your crime. What to do:
a) Create a teleport mark (the Mark spell) inside Fort Moonmoth at the questgiver.
b) Kill bad people as quick as possible.
c) Teleport away to Fort Moonmoth.
d) Speak with the questgiver and mention the bounty on your head. The questgiver will clear it so that you can enter Balmora again safely.

2. The book.
(a) If you are a member of the Thieves Guild then you are out of luck. Sottilde will not give you the book and you will be left with a decision between being expelled from the Thieves Guild (because of killing Sottilde) and failing the quest (because you aren't able to get the book). See (c).
(b) If you aren't a member of the Thieves Guild then bribe Sottilde to about 70. She will give you the book then.
(c) If you are a member of both the Thieves Guild and the Warriors Guild but you haven't got the Code Book quest so far then you can skip the quest the following way:
- Stop doing quests in the Warriors Guild before getting the Code Book quest, that means, after the Telvanni Spies at the Caldera Mines quest.
- Continue doing the Thieves Guild quests until you reach "gentleman Jim Stacey" in Vivec. He has a quest for you: bribe bosses of Warriors Guild so that the guild will cooperate with the Thieves Guild. One of the bosses to bribe is Fire Eye. After bribing Fire Eye, you can continue the Warriors Guild quests - Fire Eye will skip the Code Book quest and behave as if the quest had already been completed.