Jamie Zelermyer grew up in a world that was a lot different than what most kids experienced in the 1970s and ’80s. Until she was in sixth grade, her family was part of a Back to the Land enclave that involved radical politics, music, and communal living in and around Morgantown, W. Va. There was a real mystery element to it, too. A close friend of Jamie’s family, Marsha “Mudd” Ferber, disappeared without a trace — never to be seen or heard from again.