In a recent episode of Fresh Air Weekend, there was an interview with author Thomas Mallon, renowned essayist and historical fiction novelist. It was a most fascinating interview, focused on highlights of his career, an article in The New Yorker Magazine, and the recent release of his novel Up With The Sun .    A story about  Dick Kallman, who was an up-and-coming actor in the fifties and sixties, a closeted gay man for much of his life. Kallman had faded into obscurity until his murder in 1980. Here's what Booklist said about Up With the Sun,    "Another superb novelization of real life . . . Fluidly written with well-realized characters, the novel is great gossipy fun to read. Film and theater buffs will be delighted." In response to the question of whether the characters he creates have to be real people who interacted with historical figures; or whether what he puts into the mouths of historical figures is credible, he said that the reader should alwa...