When American folk legend Woody Guthrie died in 1967 at the age of 55, he left behind a trove of more than one thousand sets of complete lyrics with no music. In 1995, his daughter Nora approached English singer-songwriter and activist Billy Bragg and about the possibility of bringing these unheard songs to life by setting them to new music. Wilco came aboard soon after, and in 1998 Mermaid Avenue was released to critical acclaim, receiving a Grammy...