NORMAN MAILER: A Double Life, by J. Michael Lennon. (Simon & Schuster, $20.) Lennon, who as Mailer’s authorized biographer had access to a trove of unpublished letters and papers, looks unflinchingly at the life of the towering American novelist and journalist who dissected the zeitgeist from the 1950s until his death in 2007. “There’s not a paragraph in this enormous book that doesn’t contain a nugget of something you should have known or wish you had known,” Graydon Carter wrote here.