Ralph Vicinanza, a literary agent who specialized in foreign rights, died suddenly at his home on Saturday. For two decades, he represented such high-powered authors as Stephen King, Philip K. Dick, Carl Sagan, Robert A. Heinlein, George R.R. Martin, Terry Pratchett and Kim Stanley Robinson, primarily in overseas deals. In 1998, Vicinanza formed Created By, an L.A.-based production/management company that works mostly with science fiction. [Publishers Lunch]