Joe and Wanda found each other in midlife. Deeply in love, they'd just bought their new home when Joe's diagnosis of early-onset Alzheimer's changed everything. "Until death do us part" took on an immediate, deeply personal meaning. White Knight recounts the couple's four-year journey through Alzheimer's, a journey that ended with Joe's death. Initially Wanda, like many caregivers, mourned for the husband she used to have, teetering...