Can anyone recommend a finishing school or business etiquette book or school?

I'm changing careers from teaching low-income students to the financial advising world and I'm feeling a little bit %26quot;city.%26quot; My image isn't the concern, but handling myself gracefully in a new, commissioned based sales environment is.. Thanks for the help.
Can anyone recommend a finishing school or business etiquette book or school?
Being no expert on etiquette, I don't know about this specific question. However, here is a free online etiquette training website. Its informative and its fun:

http://www.etiquettepolice.com/

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