Vampire Invaders

From publisher blurb: You are one of the world's leading experts on vampires. You've been invited to attend an emergency conference at the National Space Institute, where you and the top officials from the FBI, the air force, and NASA are examining evidence that vampires from outer space have invaded the Earth. Your expertise is needed to track down the vampires. Where should your mission begin -- in Oklahoma, where a suspicious UFO was recently sighted? Or in New Orleans, where a gruesome vampire murder has just taken place?