For five decades, as a singer, musician, songwriter, and producer, Tim O'Brien has ceaselessly explored the vast American musical landscape. While Appalachia and Ireland eventually became facets of the defining myth surrounding him and his music, he has digested a broad array of roots styles, reshaping them to his own purposes. Award-winning biographer Bobbie Malone and premier country music historian Bill C. Malone have teamed again, this time to...