A New York Times Bestselling AuthorJoe O?Brien, a forty-four-year-old police officer from Charlestown, Massachusetts, is a devoted husband, proud father of four children in their twenties, and respected officer. Joe has bouts of disorganized thinking, uncharacteristic temper outbursts, and strange, involuntary movements. A neurologist diagnoses Huntington?s disease, with no treatment or cure. Each of Joe?s children has a 50 percent chance of inheriting it. A simple blood test can reveal their fate.,