It is a singular work of biographical art that makes most studies of, as Hickey’s essay on Baker is so wonderfully titled, “A Life in the Arts,” seem craven, compromised, or dishonest, with the writer falling back before the story he or she has chosen to tell, for whatever reasons offering excuses or blame in place of a frank embrace of the unresolved story each of us leaves behind, producing less any sort of real entry into the mysterious country of another person’s life than a cover-up.