Vamps by Nancy A. Collins
Lilith Todd is the "It" girl of the supernatural world. Her rich and powerful Old Blood father gives her whatever she wants, her promised, Jules, will make her a Countess when they are bound, and she already rules the world of fashion and popularity. One night, while out slumming, she runs into Cally, a New Blood who challenges Lilith in a fight over a potential victim. The Newbie turns out to be a Stormgatherer, but Lilith would still have beaten her if not for the sudden appearance of Van Helsings. The VH's stake Lilith's friend, but the rest of the vampires manage to get away. Lilith blames the Newbie and vows to kill her if she ever sees her again. It might be easier than she expected. When Monday rolls around Lilith finds that Cally has transferred to Lilith's prestigious school, Bathory Academy. Though the Academy is a vendetta-free zone, Lilith won't let a little thing like the rules stand in her way.
This book started out as Gossip Girls meets vampires, with constant brand name dropping, underage partying and references to amorous adventures. But the tone quickly changed when Cally appeared, and the plot's pacing picked up. The story that unfolded was interesting and different from most of the vampire fiction on the shelves. I can't wait to see what happens in book two!