Author Amy Guth Is Not Like Metallica. She Actually Embraced the Digital Revolution 15 Years Ago. Posted by April 8, 2016 Leave a comment on Author Amy Guth Is Not Like Metallica. She Actually Embraced the Digital Revolution 15 Years Ago. The multi-talented Chicago radio host uses the digitizing of the music industry as an analogy of what she went through to self-publish her first book in 2006.