"Born only nineteen months apart, fun-loving brothers Dean and Doug DeMoe were known for raising hell in their small Midwestern town. But all that changed when Doug was diagnosed with Alzheimer's disease at the age of forty-three. The DeMoes discovered that each of the six siblings was at risk for the most devastating form of the disease. Rather than surrender in the face of such news, the DeMoes agreed to spend their abbreviated years as part of a world-wide study, led by a team of extraordinary doctors, offering hope for future treatments -- and a cure for this terrible disease." -- Back cover.