Book excerpt: What's it like growing up as the offspring of rock royalty? Living through bizarre backstage – and onstage – experiences, unconventional childhoods, drugs, debts and mad babysitters, the subjects of this book may have grown up quickly but their backgrounds shaped them in very different ways. In this frank and affectionate book, Zoë Street Howe meets the children of iconic music figures and discovers if a rock star parent really is a blessing or a curse.