The Direputable History of Frankie Landau-Banks

Shelly recommended this one to me, and it was really great! E. Lockhart creates an interesting prep school world where Frankie, a very bright girl, feels left out of her boyfriend's secret all male society and masterminds a brilliant takeover. This is the girl I wanted to be when I was her age! It was clever and fun, and while I probably won't ever read it again, if I were 17 I would.