Now in paperback with a new foreword, the classic field guide to the demons that continue to inhabit our world. If you met a werewolf on the eve of a full moon, would you know how to tell what he really was? Could you resist the dark charms of a vampire or the lure of a fallen angel? Did you know that the razor-sharp tail of the Mbulu of South Africa has a mind of its own? Or that the Kuru-Pira of Brazil has eyes that glow like embers...