Book excerpt: Bob Dylan has always been something of a mystery. He has worn a variety of masks that have delighted, puzzled, amused and angered his many audiences. Andrea Cossu offers a strikingly fresh explanation of Dylan and the transformations he has made throughout his career. Cossu's descriptions of key Dylan performances explain how he forged authenticity through performance, and how the various attempts to make 'Bob Dylan' have often involved the interaction between the artist, his public image and his many audiences. It Ain't Me Babe offers a striking vision of how Dylan built his image and learned to live with its burden, painting a unique and coherent new portrait of the artist.