2024 marks the end of another era for Taylor Swift, a $2 billion dollar era from the highest grossing concert tour of all time. Rolling Stone journalist Rob Sheffield calls the ambitious tour a foolhardy act of imagination that has utterly changed the music world. He's been following Taylor Swift's career through the eras and puts her talent right up there with The Beatles and Bob Dylan. His new book looks at how she transformed music; how we make it, hear it and experience it. It's called Heartbreak Is the National Anthem: How Taylor Swift Reinvented Pop Music.