The Turning. Blood Ties (20th Anniversary Edition), #1

Avoid sunlight. Drink Blood. Hate yourself. Forever. Welcome to immortality. From the moment a presumed-dead John Doe sank his fangs into my neck, I've been living on borrowed time. The Voluntary Vampire Extinction Movement demands fealty from all newly-created vampires, and they've got a moody, mysterious assassin who's more than willing to drive a stake through my heart if I don't join them. But I'm bound to my sire by a seductive, primal bond, and he's one of the Movement's most wanted vampires.
With him, I can live in opulence and indulge the darkest, most depraved desires of my vampire nature. An eternity at his side, wielding the power of vampire nobility, is a temptation that comes with an impossible price: my dedication to human life. I just wanted to be a trauma surgeon. Instead, I'm a pawn in a war between two vampire factions--and a century-old feud between two very different killers.
With my heart and soul on the line, I have to choose between protecting humanity, or abandoning my own.