Zal may well have exactly what he's after, then.
Just btw, I think it'd be better if your character had his bookshop and house in the same building, like 99% of shop-keepers in entire tamriel. The town of Valton is too small to give out two houses for one person.
I got the feeling that your charatcer went from his house, to his book-selling house in your post.. I wonder how that could be fixed. Since no-one saw you, you can just edit out that part of going to a new building and simply saying you opened up your house for book-selling.
(this will not only make more sense space-wise, it'll also be easier for modders this way)
Edit: Is the bandit situation progressing at all... I expected the battle to happen sometime around midday.. But nothing has been heard of the situation.