From the Modern Library’s new set of beautifully repackaged hardcover classics by Truman Capote—also available are In Cold Blood, Portraits and Observations, and The Complete StoriesTogether in one volume, here are a pair of literary touchstones from Truman Capote’s extraordinary early career: the transcendently popular novella Breakfast at Tiffany’s and Other Voices, Other Rooms, the debut novel he published as a twenty-three-year-old prodigy.   Of all his characters, Capote