The Vampire Diaries: The Fury by L. J. Smith

Love can kill

Elena: with Damon at her side, and wild with her craving for blood, the changed Elena struggles to control her desires.

Damon: his hunger for the golden girl wars with his hunger for revenge against Stefan.

Stefan: tormented after losing Elena, he will do anything to get her back. Even if it means becoming what he once despised. . . .

Getting what they want may come at a deadly cost.