Running Dog is a 1978 novel by Don DeLillo. At its center is a rumored pornographic film of Adolf Hitler, purportedly filmed in his bunker in the climactic days of Berlin's fall. The novel follows a journalist as she tries to penetrate a murky black market of wealthy erotic-art collectors in order to locate the film. The tale grows increasingly wild and violent as she closes in on this bizarre grail. The book derives its title from a fictional "underground" magazine modeled on Rolling Stone. This publication also featured in Great Jones Street.