Jason Isbell has had a terrific few years, with his albums critically acclaimed to the point where some have dubbed him "the best songwriter working in rock," a couple of Grammys on his shelf, and a passel of Americana Music Awards. On the personal side, Isbell played on wife Amanda Shires' album "My Piece of Land" last year, and that record won her the biggest plaudits of her career, while the couple's daughter, Mercy Rose, will be three years [...]