When sixteen-year-old Sara Parcell goes missing, it's an utter tragedy . . . and an entertaining national obsession in this thoughtful and addictively readable novel that offers a fresh and provocative take on whodunits and true crime. Sixteen-year-old Sara Parcell disappeared without a trace on a crisp April morning in Frederick, Maryland. Her tragic story was a national obsession and the centerpiece of a controversial TV docu-series that followed her disappearance in real time. But…