Later Auden By Edward Mendelson (Farrar, Straus and Giroux, 570 pp., $30) W.H. Auden: A Commentary By John Fuller (Princeton University Press, 613 pp., $35) The poet Auden, though not an immodest man and even in some ways a humble man, decently enjoyed his fame, and he would have been pleased, though probably not surprised, by the volume of posthumous attention that his life and works have receiv...