This article focuses on the books “Gore Vidal: A Biography,” by Fred Kaplan and “Gore Vidal: Sexually Speaking. Collected Sex Writings,” edited by Donald Weise. These books are biographies of Gore Vidal. Vidal’s life was that fought between the public figure and the private man. And here, just as one suspected, the blessings were mixed. It’s tempting to conclude that Vidal had too easy a time moving in and out of early television, Broadway, Hollywood, the talk shows and Democratic Party politics.