Gram Parsons pushed the Byrds into country-rock territory on Sweethearts of the Rodeo, and then quit to form the acclaimed Flying Burrito Brothers. Parsons' second solo record, Grievous Angel, is a haunting masterpiece of country soul. By the time the album was released, Parsons had been dead for four months. He was 26 years old. Jason Walker has conducted hundreds of hours of new interviews with Gram's fellow musicians, friends and associates to...