As groundbreaking on stage as he was in the studio, David Bowie was one of the great live performers, but the rock icon stepped away from the touring circuit in 2004, never to return. 

John Giddings, the star’s agent, says a comeback had never been close. “I always thought there would be a possibility of doing one or two shows,” reveals the Solo Agency MD. “I never really thought he would tour again, but he never actually said to me, ...