Book excerpt: From Quentin Tarantino (Kill Bill) to Eli Roth (Hostel), the young guns of modern Hollywood just can't get enough of that exploitation film high. That's because, between 1970 and 1985, American Exploitation movies went berserk. Nightmare USA is the reader's guide to what lies beyond the mainstream of American horror, dispelling the shadows to meet the men and women behind 15 years of screen terror: The Exploitation Independents! Ranging from cult favourites like I Drink Your Blood to stylish mind-benders like Messiah of Evil.