A vivid portrait of an uncommon friendship that spans generations, uniting the wisdom of youth with the spark of old age They met under the least auspicious circumstances. He was a teenage volunteer at a nursing home on the Upper West Side of Manhattan. She was a wheelchair-bound resident in her nineties. He was poor, Hispanic, living in a rented room in the barrio, separated from his family. Her life, at least before arthritis hobbled her, was comfortable,...