Vamps by Nancy A. Collins

When the sun goes down, New York's true elite all head to one place: Bathory Academy, where the young ladies of the finest vampire families are trained in shapeshifting and luring their prey.

Bathory's reigning queen, Lilith Todd, is the daughter of a powerful vampire businessman, and she knows exactly what she wants from life. She wants to look beautiful for eternity and party till the sun comes up with her gorgeous boyfriend, Jules. And she doesn't want any New Blood upstarts standing in her way.

Enter Cally Monture, an unexpected threat from a trash zip code. When their first meeting leads to tragic results, Lilith is hungry for revenge.