Film historian David J. Skal. He's an expert on the horror film genre. His books include Hollywood Gothic: The Tangled Web of Dracula from Novel to Stage to Screen (W.W. Norton) and The Monster Show: A Cultural History of Horror (Penguin, paperback). His newest book (written in collaboration with Elias Savada) is Dark Carnival: The Secret World of Tod Browning, Hollywood's Master of the Macabre (Anchor Books).