It is hardly surprising that the southern Tennessee River Valley is thick with ghosts. Beneath its green hills lies the headless skeleton of John A. Murrell, "the Great Western Land Pirate," whose name is still feared more than a century and a half after his death. The battles at Chickamauga and Chattanooga were among the bloodiest of the Civil War. Even now, troubled spirits wander the former killing fields and hospital sites. The southern Tennessee...