Advice for a librarian outfit?!

my friends having a L party and I think im gunna go as a librarian, any ideas for a cute outfitt I could wear? I want it to be kinda sexy =] but I dont want to spend a whole lot of money, sugguestions?

A really nice black suit, short skirt jacket with a tight shirt or tight t-shirt on the inside, have hair pulled back either bun or pony tail, nice high heels,,

yeah def a nice skirt and heels, which won't cost much at all. the skirt is affordable, and the heels you can even go to payless for. that and a buttom up shirt. about 2 buttons open, and the sexy key to the librarian.. the glasses. trust me, its def a good look. hair pulled up is a plus. I kinda disagree w. littlered, only on the jacket, because the jacket is more sexy office co-worker than librarian . hope this helped.

knee length or over the knee length skirt
in either black, or navy blue
button up stirt tucked into the skirt
hair put into a pony tail, reading glasses that look sofisticated
or normal sunglasses that look a bit like reading oes if you dont have any
heels yould make the outfit as well
librarians usually dress in darker colours like navy blue and blacks
but really you can mix it up howevere youd like