Tim Riley is the author of TELL ME WHY: A BEATLES COMMENTARY (Knopf/Vintage 1988/9, Da Capo 2002); HARD RAIN: A DYLAN COMMENTARY (Knopf/Vintage1992/3, updated Da Capo edition 1999); MADONNA: ILLUSTRATED (Hyperion 1992); FEVER: HOW ROCK'N'ROLL TRANSFORMED GENDER IN AMERICA (Picador 2005). He is at work on a major new biography of John Lennon for W.W. Norton. His music commentary can be heard on National Public Radio's HERE AND NOW, produced weekdays out of WBUR-FM in Boston.