The career of Emmylou Harris has spanned the wide open range of American music. Whether singing traditional ballads, country classics, or her own highly personal compositions, her achingly pure voice and emotional commitment to her music have remained constant. She first won national attention in the early 1970s, recording and performing with country-rock pioneer Gram Parsons. Her major label solo debut Pieces of Sky in 1975 gave her a Top Ten hit, "If I Could Only Win Your Love." The 1976 follow-up, Elite Hotel, included two Number One songs, "Together Again," and "Sweet Dreams,"...