“Bob Dylan turned 69 in May. To make it sound more portentous: He has now entered his 70th year. Bob was always chronologically a little ahead of the generation that embraced him, and now, as Baby Boomers are rounding into their ’60s and taking, some of them, their first look at the end of the road, Dylan is out there on the frontier, spying what’s to come, what’s already here. The news is not good.”