A prevailing narrative goes: Bob Dylan, the voice of Sixties counterculture, disappeared in the 1970s in a haze of substance abuse, made arguably the worst music of his career, and was finally put to bed in the 1980s--only to be resurrected in 2016, when he was awarded the Nobel Prize in Literature. Dylan's concerts once began with an announcer intoning a deadpan version of just such a narrative. That is not this story. Drawing on thousands...