Reckoning (Bloodline, Bk. 2)

Mary Seward thought she had escaped the darkness of Transylvania. But now, back in England, she has terrible nightmares, fears the night, and sees vampires everywhere she turns. When a strange virus weakens her father, Mary suspects that there's a far more sinister explanation for the disease than doctors can provide. Then Mary's worst nightmare comes true: Quincey Harker, heir to Count Dracula's bloodline, appears in England. He declares his eternal love for Mary and claims he has renounced his evil heritage. Is he telling the truth - or playing a deadly game?