One of the finest singer/songwriters to emerge from the indie rock scene of the late '80s, Bill Callahan uses the images of the American West in ruggedly thoughtful ways that speak to the present as well as the past. After releasing a string of critically acclaimed albums as Smog, he began making music under his own name with 2007's Woke on a Whaleheart. The switch reflected how much richer and deeper his music had become over the years, both literally and figuratively: His songs were increasingly contemplative, while the drawl he used to deliver them grew lower and slower wit...