Open Question: I have a new job, please recommend me some books/websites?

I have a new job working for a custodian bank as a valuations admin... I want to get some knowledge about my work and can someone recommend me any good books or websites I can use?? My duties are: Accurate and timely reconciliation and control of assigned funds that include • Cash • Stock • Other assets • Income and Expense Completion of accurate and complete periodic Net Asset Valuations (NAV)