Elijah Wald is a writer and musician who speaks several languages and has travelled widely around the world, first as a hitchhiking street musician and later as a somewhat more serious researcher. His books include Escaping the Delta: Robert Johnson and the Invention of the Blues (2004); Narcocorrido: A Journey into t he Music of Drugs, Guns, and Guerrillas (2001); Josh White: Society Blues (2000, 2002) and River of Song: Music Along the Mississippi (1998; with John Junkerman).