Did not give me any option to choose which division I would be a part of. (Pursuing the dialogue paths on the book didn't anyway, or anything else I could find in the house)
Put 5000 gold in the coffer as is the requirement for promotion as a merchant, didn't get promoted. ( I thought this would promote me to the specified division)
Character is Morden Blackrush, account is WalterBishop
You need to have that amount when approaching the books, then select the division you want to join. In addition you need to complete the additional requirement needed for that particular direction.
I had already deposited the 5000 when I approached the book for the last time, there is no listed additional requirement for the Merchant Caste.
Also the read about positions dialogue option on the book does not seem to work.
You don't deposit the gold, you need it on your character.