By the late 1960s, the most famous writer in America had become a recluse, having forsaken his dazzling career. Nevertheless, J.D. Salinger often came to Manhattan, staying at his parents' sprawling apartment on Park Avenue and 91st Street. While he no longer visited with his editors at "The New Yorker," he was keen to spend time with his spiritual teacher, Swami Nikhilananda, the founder of the Ramakrishna-Vivekananda Center, located, then as now, in a townhouse just three blocks away, at 17 East 94th Street.

Though...