Vamps #3: After Dark by Nancy A. Collins

What good is a designer dress if someone puts a stake through it?

It's the most important event of the season in New York's upper-crust vampire society. The Rauhnacht Grand Ball has everything you need for a night of scandal and intrigue: gala dresses, stolen boyfriends, forbidden love . . .

Then a team of vampire hunters shows up and ruins everything! The surprise attack by Van Helsings is the worst gate-crashing ever.

In the aftermath, half sisters Lilith and Cally scramble to regain their footing at the exclusive Bathory Academy—and in the world of high fashion, where both have star potential. When new suitors turn the romance up a notch, it's almost enough to make the half sisters forget their intense rivalry. Almost. But shared blood between vampires is not easy, and before long Lilith and Cally find themselves face-to-face again.