THE BIG BAD CITY In this city, you have to pay attention. In this city, things are happening all the time, all over the place, and you don't have to be a detective to smell evil in the wind.  Take this week's tabloids: the face of a dead girl is splashed across the front page. She was found sprawled near a park bench not seven blocks from the police station. Detectives Carella and Brown soon discover the girl has a most unusual past. Meanwhile, the late-night news tracks the exploits of The Cookie Boy, a professional thief who leaves his calling card -- a box of chocolate chip cookies -- at the scene of each score. And while the detectives of the 87th Precinct are investigating these cases, one of them is being stalked by the man who killed his father.  Welcome to the Big Bad City.