Already on shelves ahead of its “official” release date is Mark Twain’s long embargoed Autobiography. Also new this week are The Petting Zoo, a posthumously published novel by punk poet Jim Carroll; a new collection of Selected Stories from master of the form William Trevor; Cynthia Ozick’s “retelling” of of Henry James’ The Ambassadors, Foreign Bodies; and, in time for election day today, Matt Taibbi’s collection of biting political journalism, Griftopia.