Book excerpt: A vampire puts the bite on a dental assistant. It's a lousy first day on the job for Nina Blackman when a patient, loopy from the anesthesia, bites her. At least he was cute. But for real drama she can't beat the next evening. Nina wakes up with a set of razor-sharp fangs, bionic vision, supersonic hearing, and a taste for blood. But there's a good explanation: It's her patient, Long Island vampire Greg Statleon. Actually they're perfect for each other-if Nina's willing to commit to one man for eternity.