This is a tribute to American roots music - country, rockabilly and the blues - spotlighting artists both celebrated and obscure, including Elvis Presley, Ernest Tubb, Bobby "Blue" Bland, Merle Haggard and Sleepy LaBeef. Guralnick conveys the passion that drove these men to music-making and that kept them determinedly, and sometimes desperately, on the road. It is the second book of a triology focusing on the most revolutionary eras in music history.