A group of three friends who made music in a house in Lubbock, Texas, recorded an album that wasn't released and went their separate ways into solo careers. That group became a legend and then--twenty years later--a band. The Flatlanders--Joe Ely, Jimmie Dale Gilmore, and Butch Hancock--are icons in American music, with songs blending country, folk, and rock that have influenced a long list of performers, including Robert Earl Keen, the Cowboy Junkies,...