“I first learned about Huntington's Disease from a roommate I had in my twenties,” writes Juliette Fay, author of The Shortest Way Home, “HD is an incurable, terminal disease, passed genetically from one generation to the next. Sue's mother had HD, giving Sue a 50 percent chance of inheriting the disease herself. Symptoms typically arise in the carrier's 30s or early 40s, and since there was no test for it at the time, Sue had no way of knowing if she would begin to lose her physical and mental capacities in ten years . . . or never.