Is This a Twilight Book, a Vampire Book?

At the beginning of the book, she is a slightly more sympathetic, like Regina George. She is very like high school queen bee. And maybe there's like one girl who doesn't like her, but she's stupid and we don't get to. It's so weird because we never get an explanation for that. I'm assuming in later books, but she seems really puzzled that Caroline's antagonistic right out of the gate.