''[It’s] one of those books that once you get it, you don’t know how you lived without it . . .,'' Says Dahlia Jane of Upon a Midnight Dreary. ''The book is a digest of centuries of wisdom passed down about vampires, werewolves, and zombies. I’m astonished with how much information is packed into such a small volume. About six inches long and four inches wide, it’s the perfect size to tuck into your vampire killing kit or carry-on.''